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Ecology: Questions and Answers on Ecology

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Here is a list of top twenty-five interview questions on ecology which help you to succeed in an interview.

Q. 1. Define ecology.

Ans. According to Haeckel (1869) ecology is “the science treating the reciprocal relations of organisms and the external world”. Warming (1905) defined ecology as “the study of organisms in relation to their environment”.

Q.2. Give the names of five foreign ecologists of international fame.

Ans. Haeckel, Warming, Odum, Clements, Taylor.

Q.3. Give the names of five Indian workers on ecology.

Ans. R. Mishra, G.S. Puri, S.C. Pandeya, P.S. Ramakrishnan, R.S. Ambasth.

Q. 4. Define autecology.

Ans. The science dealing with the relation of individual species to its environment is called autecology.

Q. 5. What is synecology?

Ans. The study of the groups of organisms in relation with their environment is made under synecology.

Q. 6. What are the basic branches of synecology?

Ans. Population ecology, Community ecology, Biome ecology, Ecosystem ecology, etc.

Q. 7. What are the types of ecological factors?

Ans. Climatic factors (light, temperature, rainfall, humidity, etc.), Topographic factors, edaphic factors and biotic factors.

Q. 8. What is phytogeography?

Ans. The science which deals with the geographical distribution of plants is called phytogeography.

Q. 9. Define genecology.

Ans. The study of ecology which deals with the variations of species based upon their genetic potentialities.

Q. 10. What are the chief topographic factors?

Ans. The important topographic factors are height of mountains, direction of mountains and valleys, steepness of the slopes, exposure of slope, etc.

Q. 11. What do you know about edaphic factors?

Ans. The ecological factors in which we study the structure and composition of soil, as well as its chemical and physical characters.

Q. 12. Define a soil profile.

Ans. Soil profile is an imaginary longitudinal section of the soil showing its different regions. The different regions are horizon ‘A’, horizon ‘B’, horizon ‘C’ and horizon ‘D’. The soil is actually devisible into top soil and sub-soil.

Q. 13. What are the range of diameters of particles of clay, silt and fine sandy soil?

Ans. Clay soil – Less than 0.002 m.m.

Silty soil -0.002-0.02 m.m.

Fine sandy soil -0.02-0.20 m.m.

Q. 14. What are the types of soil erosion?

Ans. Chief types of soil erosion are water erosion (sheet erosion, rill erosion, and gully erosion), wind erosion, landslides or slip erosion, and over felling and overgrazing.

Q. 15. Define in brief the soil conservation.

Ans. Various methods of checking the soil erosion are studied under soil conservation.

Q. 16. Name some free-floating hydrophytes.

Ans. Azolla, Eichhornia, Lemna, Pistia, Salvinia, Spirodella, Wolfia, etc.

Q. 17. Name only four rooted-submerged hydrophytes.

Ans. Hydrilla, Isoetes, Potamogeton and Vallisneria.

Q. 18. Name some succulent xerophytes.

Ans. Opuntia, Aloe, Agave, Euphorbia splendens, Cereus, Mammalaria, etc.

Q. 19. Name some ephemeral annual xerophytes.

Ans. Argemonemaxicana, Solanum xanthocarpum, Cassia tora, etc.

Q. 20. Define ecological succession.

Ans. Sequential occurrence of communities over a period of time in the same area is called ‘ecological succession’.

Q. 21. What are the sequential stages of a hydrosere or hydrarch?

Ans. Phytoplankton stage, Rooted-submerged stage, Rooted-floating stage, Reed-swamp stage, Sedge-meadow stage, Woodland stage and Forest stage or Climax.

Q. 22. What are the sequential stages of a xerosere on rock?

Ans. Crustose lichen stage, Foliose lichen stage, Moss stage, Herb stage, Shrub stage and Forest stage or Climax.

Q. 23. What are the types of ecological pyramids?

Ans. Pyramids of number, pyramids of biomass and pyramids of energy.

Q. 24. Define pollution?

Ans. According to E.P. Odum (1971) the “pollution is an undesirable change in the physical, chemical or biological characteristics of our air, land and water that may or will waste or deteriorate our raw material resources”.

Q. 25. What are the various agencies of pollution?

Ans. Sewage, industrial wastes, smoke, automobile exhausts, herbicides, insecticides, noise and radioactive substances are the main agencies of pollution.

Branches of Ecology and Levels of Ecological Organisation
Levels of Organism and Two main Subdivision of Ecology

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Ecology Questions and Answers - Biology Form 3 Topical Revision

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State how excessive use of pesticides may affect soil fertility

Describe the procedure that may have been used to determine the mean body length of the fish ( 6 marks)
What are the likely reasons for the difference in the mean body length of the fish living in lakes A and D? ( 4 marks)
Suggest one reason for the absence of snails in lakes C and D? (1 mark)
Name any six abiotic (physical) factors that are likely to influence the plant and animal life in lake A. ( 3 marks)
Explain how each of the factors named in (i) may influence the plant and animals life in Lake A. ( 6 marks)
From this record of observations construct a feed web (5 marks)
Bird species as a secondary consumer (1 mark)
Large fish as tertiary consumer (1 mark)
The biomass of the producers in the lake was found to be greater than that of primary consumers. Give an explanation for this observation? (1 mark)
Two organisms that compete for food in the lake. (2 marks)
The source of food the organisms in d (i) above compete for (1 mark)
State three ways by which many may interfere with this lake ecosystem ( 3 marks)
Explain how each of the ways you have states may affect life in the lake? ( 6 marks)
Plant A ( 1 mark)
Plant B ( 1 mark)
In which year were the fish populations lowest?
State the factors that might have caused the lowest fish populations during the year you have stated in (a) (i) above ( 3 marks)
Explain how each factor you have stated in (a) (ii) above could have brought about the changes in fish populations (11 marks)
What is the difference in the rate of population recovery of species A and D? (1 mark)
Suggest two biological factors that could have led to this difference (2 marks)
State a method that might have been used to estimate the fish population in the lake ( 1 mark)
State one disadvantage of the method you have stated in (c) (i) above (1 mark)
Industrial wastes may contain metallic pollutants. State how such pollutants may indirectly reach and accumulate in the human body if the wastes were dumped into rivers.
State three measures that can betaken to control infection of man by protozoan parasites ( 3 marks)

Construct two food chains ending with a tertiary consumer in each case (2 marks)
Which organisms has the largest variety of predators in the food web? (1 mark)
Name secondary consumers in the food web ( 2 marks)
Suggest three ways in which the ecosystem would be affected if there was prolonged drought ( 3 marks)
Calculate the population size of the crabs in the lagoon using the formula below N = n x M M Where N= Total population of crabs in the lagoon n= Total number of crabs in the second catch M= Number marked crabs during the first catch M= Number of marked crabs in the second catch. ( 2 marks)
State two assumptions that were made during the investigation ( 2 marks)
What is the name given to this method of estimating the population size? (1 mark)

Write down the food chains in which the guinea fowls are secondary consumers (1 mark)
What would be the short term effects on the eco- system of lions invaded the area? ( 3 marks)
Name the organisms through which energy from the sun enters the food web. (1 mark)

Name the organisms that causes processes E and J ( 2 marks)
Name the processes represented by F and H (2 marks)
Name the group of organisms represented by c (i)
Distinguish between a community and a population (2 marks)
Describe how a population of grasshopper in a given area can be estimated (5 marks)
Explain how the various activities of man have caused pollution of air ( 20 marks)
Explain how birds of prey are adapted to obtaining their food ( 2 marks)
Name the crop infested by phytophthora infestants and the disease it causes Crop - Disease -
State four control measures against the diseases ( 4 marks)
Explain why the carrying capacity for wild animals is higher than for cattle in a given piece of land ( 2 marks)
Autecology ( 1 mark)
Synecology ( 1 mark)
State the modification found in the stomata of leaf C
Name the organism that causes amoebic dysentery.

Name the process through which energy from the sun is incorporated into the food web ( 1 mark)
State the mode of feeding of the birds in the food web (1 mark)
Name two ecosystem in which the organisms in the food web live( 2 marks)
From the information in the food web construct a food chain with the large bird as a quarter – nary consumer ( 1 mark)
What would happen to the organisms in the food web if bird N migrated?
Not all energy from one trophic level is available to the next level. Explain (3 marks)
Two organisms, which display a role in the ecosystems, are not included in the food web. Name them. ( 1 mark)
State the role played by the organisms named g (i) above. (1 mark)
State three human activities that would affect the ecosystems ( 3 marks)
How would the activities stated in h (i) above affect the ecosystems? (3 marks)
How is aerenchyma tissue adapted to its functions? ( 2 marks)
Explain how abiotic factors affect plants ( 20 marks)
Decomposers

Distinguish between pyramid of numbers and pyramid of Biomass (2 marks)
Give three reasons for loss of energy from one trophic level to another in a food chain. ( 3 marks)
Describe how the belt transect can be used in estimating the population of a shrub in a grassland ( 2 marks)
Distinguish between population and community ( 2 marks)
Fish in a pond ( 1 mark)
Black jack in a garden ( 1 mark)
State two ways in which schistosoma species is adapted to parasitic mode of life
Describe causes and methods of controlling water pollution ( 20 marks)
What is biological control of population growth? ( 2 marks)
Describe one example where biological control has been used successfully (2 marks)
Explain why the number of predators in nay ecosystem is less than the number of their prey ( 1 mark)
Antelopes are more commonly found in open grassland while giraffe while giraffes are commonly found in wooded areas. ( 2 marks)
In the savannah there is a wider variety of herbivores in wooded areas than in open grassland ( 1 mark)
Removal of predators for an herbivore may in the long run lead to a decrease in its population
Explain why primary productivity decreases with depth in aquatic environments. (2 marks)

Identify the compound named A ( 1 mark)
Name the processes X _________________ Y _________________ Z _________________
In what form is nitrogen found in plants and animals?
Fruits found in forest and savannah ( 2 marks)
Seed found in forest and savannah ( 2 marks)
State two factors that may cause this difference in (a) above ( 2 marks)
Which species show more fluctuation in numbers? ( 1 mark)
Suggest an explanation of this ( 3 marks)
Suggest two ways by which the savannah environment can be destroyed and how it can be conserved ( 4 marks)
- May kill soil micro-organism that decompose humus to release mineral salts - Soil structure interfered with encouraging soil erosion.
- Drought/food shortage /overgrazing - Fire - Emigration
The fish were caught, their age determined and the 2 year olds were retained and their length measured and recorded. - This was done repeatedly until a large number were measure; calculation was done by dividing the total length of all fish by the total number of fish.
Lake A has hard water with more calcium while Lake D has soft water with no calcium. Calcium is necessary for bone formation. Fish in Lake A grow faster and greater bone length than fish in Lake D. Lake C has more food which fish eat than Lake D.
Lakes C and D have little or no calcium which is necessary for the formation of the shell in snails.
Light, temperature, carbon dioxide concentration, oxygen concentration, PH and salinity.
Light - Affects the rate of photosynthesis. Temperature - Affects enzyme activities hence photosynthesis. CO 2 concentration – Determines rate of photosynthesis. O 2 Concentration - affects rate of respiration. Salinity – Osmoregulation in plants and animals. PH – Affect enzyme activities.

Planktonic algae → Planktonic crustacean → Birds
Planktonic algae → Planktonic crustacean → Small fish → Large fish
Producers must always have a higher biomass than consumers because they support the consumers which are at higher trophic levels
Pollution – herbicides and pesticides, over fishing, bird hunting
Herbicides and pesticides – kill insect and planktonic algae reducing their number. - Fishing increases planktonic crustaceans and insect larvae leading to over consumption of algae depleting them. - Decrease in number of insect larva.
A - Desert, arid and semi-arid
B - Aquatic, marshy land
Hot water, sewage and industrial waste.
High temperature reduces dissolved oxygen causing suffocation of fish. - Sewage leads to eutrophication reducing oxygen concentration and reduces penetration of light. - Industrial waste- toxic substance kills the organism.
A = 7512-20 = 7492 / 5 = 1498.4 fish per year B = 617- 23 = 594 / 5 = 118.8 fish per year Difference = 1379.6 fish per year
- Reproductive rate - Competition - Predation - Sex ratio
Capture/recapture method
Marks may disappear During marking fish may be killed Predation/death may interfere.
The pollutants may be absorbed by aquatic plants which in turn may be eaten by fishes. The pollutants therefore get into man through the food chain.
- Improving sanitation to prevent infection by parasite. - Insecticide to kill vector like mosquitoes or tsetse fly. - Avoid indiscriminate sexual intercourse to prevent spread of parasites.
Green plants → Grasshoppers → Lizards → Snakes Green plants → Grasshoppers → Lizards → Cats Green plants → Mice → Snakes → Hawk Green plants → Mice → Snakes → Cats
Lizard, cats, hawk, snakes.
Most plants will die Some organisms will starve and die Some organisms may migrate.
Population size N = 374 x 400 = 1870 80
There was even distribution of crabs; No movement in and out of lagoon/on migration. There was random distribution of crabs after first capture
Capture, mark, release then recapture/capture/recapture method.
Grass → Grasshopper → Guinea fowls Grass → Termite → Guinea fowls
Lions would complete with leopards Gazelle number would reduce Grass would be increased
E -Denitrifying bacteria J - Nitrifying bacteria
F- Nitrogen fixation H-Decomposition
Community – it is the total number of plants and animals living together in an area. Population - total number of organisms of a given species occupying an area at a certain trophic level
- Use of net to capture the grasshopper - Which are then counted and marked. They are then released. - Total number of grasshoppers is determined by multiplying the grasshoppers captured second time by those captured and marked first time. - The sum is divided by number of grasshoppers marked in second capture.
- During manufacture of sulphuric acid and nitric acids oxide of sulphur and nitrogen are released into air causing acid rain. - Motor vehicle exhaust fumes release carbon monoxide a respiratory poison. - Combustion of fuels and coal increase concentration of carbon dioxide creating greenhouse effect. - Aerosols containing CFC in herbicides and perfumes deplete the ozone layer. - Smoke from factories mix with fog forming smog which reduces visibility. - Exhaust fumes from vehicles contains lead from leaded petrol that poisons the body. - Deforestation exposes top soil to air currents encouraging sheet erosion - Leaded petrol that poisons the body. - Loud noise from factories, aeroplanes and Jua Kali workshops can lead to poor hearing ability. - Radio active emissions can lead to mutations.
Curved sharp hooked strong beaks for killing or tearing flesh from bones. Curved strong sharp claws for holding prey.
Crop- potato/tomato Disease- potato blight/tomatoes rot
- Use of fungicides - Uprooting and burning infected plants - Crop rotation - Use biological control - Use disease resistant varieties
Cattle are mainly grazers while most wild animals are browsers.
Study of a single species within a community or ecosystem.
Study of different species of organisms in a natural community in an ecosystem.
A-Aquatic/Fresh water B- Forest C- Arid- Semi Arid
- Sunken stomata, - Reversed rhythm - Small stomatal pores
Entamoeba histolytica
Photosynthesis
Heterotrophic
Aquatic (pond) and terrestrial (forest)
Algae → Zooplankton → Small fish → Bird J → Large bird
- Number of snails would increase - Green plants would decrease. - Bird M would increase
In a lower trophic level energy is lost through respiration, excretion and death of some organisms.
- Vultures - Decomposers
Vultures- control population of the large birds. Decomposers- cause decay of dead organisms recycling the nutrients.
- Deforestation - Bird hunting - Over fishing
Removal of the trees destroys the habitat for birds, they therefore migrate. - Bird hunting kills the birds reducing their number and increasing small fish, mussels and snails. - Over fishing reduces the number of small fish increasing zooplankton and reducing the algae
- Cells have large air spaces between them to enhance buoyancy. - Cells are air filled reducing their density.
Ligh t - high light intensity increase the rate of photosynthesis Temperatur e - low temperatures lower metabolic activities while moderate temperature increase metabolic activities. High temperature increases transpiration. Wind - Strong air current increase rate of transpiration and deforms the plants according to direction of the wind. Atmosphere pressure - High pressures decrease the rate of transpiration and also reduces rate of photosynthesis. Ph value - some plants thrive well in acid soils while others thrive better in alkaline soils. Radioactive radiations - Cause mutations of the offspring Oxides of sulphur and nitrogen - cause acid rain that corrodes plant leaves.
Decomposers – Cause breakdown of organic matter enhancing recycling of nutrients
Predation - The organism feeds on whole or part of another organism and therefore control their population.
X- Denitrification Y- Animals Z- Nitrification
Pyramid of number Way numbers of individuals occurring at each trophic levels of a food chain may be diagrammatically represented. Pyramid of biomass The way the total amount of living matter occurring at each trophic level of food chain may be diagrammatically represented.
- Loss through excretion e.g. egestion - Heat - Respiration
- Two parallel strings are laid down over a determined length and width within study area. - No. of organisms in belt transect are counted. - Area transect is worked out. - Number of organisms per unit area is worked out.
Population – It is all members of a given species in a particular habitat at a particular time. Community – All organisms belonging to different species that interact in the same habitat.
Capture and recapture method.
Line transect
- Produce large number of eggs for increased survival. - Produce enzymes to digest human skin when penetrating. - Can withstand low oxygen concentration. - Have hook-like structures to attach to the intestinal walls.
Industrial effluents that may be toxic chemicals which may kill the aquatic organisms. It can be controlled by treating the affluent before discharging them.
Hot water that reduces concentration of oxygen, killing the animals. It is controlled by placing high penalties on factories discharging hot water.
Oil spillage from oil tankers that reduces oxygen in water, penetration of light intensity and clog feathers of marine birds. It can be controlled by regular servicing of oil tankers.
Domestic effluents that include; - Untreated sewage that causes water borne diseases. It can be controlled by treating sewage before being discharged. - Detergents that cause eutrophication causing reduced oxygen concentration. It is controlled by banning phosphate based detergents.
Agricultural effluents that include; - Pesticides and herbicides that have heavy metals that they may gammulates along the food chain killing the higher animals. It is controlled by banning phosphate based detergents. - Inorganic fertilizers that have nitrates and sulphates that cause eutrophication. It is controlled by use of organic fertilizers.
Silting due to soil erosion that reduces penetration of light to the plants and clog respiratory surfaces of animals. It is controlled by proper methods of soil erosion control and proper farming methods.
It is use of natural predator to kill a prey e.g pest instead of use of pesticide.
The aphids are pest found in plants. The ladybirds can be used to control the aphids as they feed on them but not destroy the plants
Prey is the source of food for predators. If the number of prey is smaller than the predators they would be depleted.
Antelopes are grazers while giraffes are browsers. Antelopes have brown fur being camouflaged by the colour of grass while giraffes are camouflaged by the trees.
Trees are camouflage against the herbivores preventing them from being spotted by predators. In open grassland herbivores are easily spotted.
The population will first increase leading to competition of resource e.g. food or mates. This causes death of the weak herbivores or migrations to new habitats.
- As it gets deeper light penetration decreases reducing rate of photosynthesis hence less productivity. - As it gets deeper carbon dioxide concentration decrease hence reducing rate of photosynthesis hence less productivity
Plant protein
X-Nitrification Y-Nitrogen fixation Z- Dentrification
25-10 = 15 birds
20-5 = 15 birds
The number of species in forest are more than in the number in the savannah hence higher change. Fruits more abundant in forest than in savannah Selectively reduces with forest birds because they are many and competition is stiffer than savannah
Seeds more abundant in savannah than in forest-they they are more exposed but seeds in forest plants are inside the fruit. Birds in savannah are less selective than forest birds.
- Emigration in big numbers - High death rate during unsuitable condition and disease. - Predation increase due to attraction of predator due to their high number.
- Bush fire –avoid lighting fires - Eliminating all predators of one herbivore - Limited predator to maintain high biological control. - Felling trees- replanting trees - Having high concentration of industries that provides that cause acid rain. - Use of fuels that do not produce the oxides

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Biology topic by topic questions and answers , you can download all the biology questions and answers for all topics for form 1, form 2, form 3 and form 4., the list includes all biology questions with their answers. use the links below. click on a link to a specific material., form 4_heredity questions, form 4_heredity answers, form 4_cell divsion questions, form 4_cell division answers, form 4_applied genetics questions, form 4_applied genetics answers, form 4_4. support and movement in plants and animals q, form 4_4. support and movement in plants and animals a, form 4_3. reception response and co ordination q, form 4_3. reception response and co ordination a, form 4_2. evolution q, form 4_2. evolution a, form 4_1. genetics q, form 4_1. genetics a, form 4 - support and movement in plants and animals questions - teacher.co.ke, form 4 - support and movement in plants and animals a - teacher.co.ke, form 4 - reception, response and co-ordination questions - teacher.co.ke, form 4 - reception, response and co-ordination a - teacher.co.ke, form 4 - genetics questions - teacher.co.ke, form 4 - genetics a - teacher.co.ke, form 4 - evolution questions - teacher.co.ke, form 4 - evolution a - teacher.co.ke, form 3_plant reproduction questions, form 3_plant reproduction answers, form 3_personal health questions, form 3_personal health answers, form 3_human reproduction questions, form 3_human reproduction answers, form 3_asexual reproduction questions, form 3_asexual reproduction answers, form 3_4. growth and development q, form 3_4. growth and development a, form 3_3. reproduction in plants and animals q, form 3_3. reproduction in plants and animals a, form 3_2. ecology q, form 3_2. ecology a, form 3_1. classification ii q, form 3_1. classification ii a, form 3 - reproduction in plants and animals questions - teacher.co.ke, form 3 - reproduction in plants and animals a - teacher.co.ke, form 3 - growth and development questions - teacher.co.ke, form 3 - growth and development a - teacher.co.ke, form 3 - ecology questions - teacher.co.ke, form 3 - ecology a - teacher.co.ke, form 3 - classification ii questions - teacher.co.ke, form 3 - classification ii a - teacher.co.ke, form 2_transport plants questions, form 2_transport plants answers, form 2_skin temperature questions, form 2_skin temperature answers, form 2_food diet questions, form 2_food diet answers, form 2_excretion questions, form 2_excretion answers, form 2_digestion questions, form 2_digestion answers, form 2_breathing questions, form 2_breathing answers, form 2_blood circulation questions, form 2_blood circulation answers, form 2_5. excretion and homeostasis q, form 2_5. excretion and homeostasis a, form 2_4. respiration q, form 2_4. respiration a, form 2_3. gaseous exchange q, form 2_3. gaseous exchange a, form 2_2. transport in animals q, form 2_2. transport in animals a, form 2_1. transport in plants q, form 2_1. transport in plants a, form 2 - transport in plants questions - teacher.co.ke, form 2 - transport in plants a - teacher.co.ke, form 2 - transport in animals questions - teacher.co.ke, form 2 - transport in animals a - teacher.co.ke, form 2 - respiration questions - teacher.co.ke, form 2 - respiration a - teacher.co.ke, form 2 - gaseous exchange questions - teacher.co.ke, form 2 - gaseous exchange a - teacher.co.ke, form 2 - excretion and homeostasis questions - teacher.co.ke, form 2 - excretion and homeostasis a - teacher.co.ke, form 1_respiration questions, form 1_respiration answers, form 1_photosynthesis questions, form 1_photosynthesis answers, form 1_diffusion osmosis questions, form 1_diffusion osmosis answers, form 1_cells tissues questions, form 1_cells tissues answers, form 1_cell chemistry questions, form 1_cell chemistry answers, form 1_6. nutrition in animals q, form 1_6. nutrition in animals a, form 1_5. nutrition in plants q, form 1_5. nutrition in plants a, form 1_4. cell physiology q, form 1_4. cell physiology a, form 1_3. the cell q, form 1_3. the cell a, form 1_2. classification i q, form 1_2. classification i a, form 1_1. introduction to biology q, form 1_1. introduction to biology a, form 1 - the cell questions - teacher.co.ke, form 1 - the cell a - teacher.co.ke, form 1 - nutrition in plants questions - teacher.co.ke, form 1 - nutrition in plants a - teacher.co.ke, form 1 - nutrition in animals questions - teacher.co.ke, form 1 - nutrition in animals a - teacher.co.ke, form 1 - introduction to biology questions - teacher.co.ke, form 1 - introduction to biology a - teacher.co.ke, form 1 - classification i questions - teacher.co.ke, form 1 - classification i a - teacher.co.ke, form 1 - cell physiology questions - teacher.co.ke, form 1 - cell physiology a - teacher.co.ke.

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EOC ECOLOGY SAMPLE QUESTIONS

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INTRODUCTORY ECOLOGY

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PDF EOC ECOLOGY SAMPLE QUESTIONS
a. a forest fire. b. a lava flow. c. farm land is abandoned. d. a severe storm. _____ 31. The nutrient availability of aquatic ecosystems is the. a. amount of nitrogen, oxygen, and other elements dissolved in the water. b. number of other organisms present in the water. c. amount of rainfall the water receives.
ecology-essay-questions
Ecology students in Public Health may be asked questions about climate change not listed. below but based on the climate change lecture at the AUB. 1. Questions could be included which challenge you to think about how ecologists. study and learn about the natural world. The emphasis of these questions is on.
PDF Ecology: Practice Questions #1
Ecology: Practice Questions #1 1. One biotic factor that affects consumers in an ocean ecosystem is A. number of autotrophs B. temperature variation C. salt content D. pH of water 2. A food web is represented in the diagram below. Which population in this food web would most likely be negatively affected by an increase in the mouse population?
PDF Population Ecology in Practice
1 How to Ask Meaningful Ecological Questions 3 Charles J. Krebs 1.1 What Problems Do Population Ecologists Try to Solve? 3 1.2 What Approaches Do Population Ecologists Use? 6 1.2.1 Generating and Testing Hypotheses in Population Ecology 10 1.3 Generality in Population Ecology 11 1.4 Final Thoughts 12 References 13
PDF Wildlife Sample Test Questions/Answers
Wildlife Sample Test Questions - October 2019 6. Keystone species are those on which other species in an ecosystem largely depend. Out of the following list, select the best example of a keystone species: a. Eastern rat snake b. Allegheny woodrat c. Beaver d. Ruffed grouse 7. The largest member of the family Sciuridae in Maryland is the: a ...
PDF Practice Exam Questions
ESSAY QUESTIONS Answer all parts of the following questions completely. 1. (A) Diagram a Gram-positive and Gram-negative bacterial cell wall. (B) Demonstrate the differences in the chemical structure of these two types of bacterial cell walls.
DOC Ecology Essay Questions
answer one way in which human activity has an impact on the nutrient cycle you have. chosen. 2. Using an example for each, discuss the following ecological concepts. a) Succession. b) Energy flow between trophic levels. c) Limiting factors. d) Carrying capacity. 3. Describe the trophic levels in a typical ecosystem.
Essay Exam Questions
Genes to Ecosystems Exam Essay Questions: Illustrate the wide range of abioic and bioic factors that inluence a populaion's patern of abundance. Discuss some reasons why community composiion changes as one moves (1) Up a mountain (50 marks) and (2) Down the coninental shelf into the abyssal depths of the ocean (50 marks).
Key questions in ecology: a study and revision guide
This book is a study and revision guide for students following programmes of study in which ecology is an important component. It contains 600 multiple-choice questions (and answers) set at three levels - foundation, intermediate and advanced - and grouped into 10 major topic areas: Â· The history and foundations of ecology.
PDF Review Unit 10: Ecology
The mouse and grasshopper are at the same trophic level. The grass is a producer. All of the organisms except grass are consumers, regardless of position. 14. The organic and inorganic materials in all the organisms in the diagram will eventually return to the environment by the action of (90:108) decomposers.
Identification of 100 fundamental ecological questions
The questions reflect many of the important current conceptual and technical pre-occupations of ecology. For example, many questions concerned the dynamics of environmental change and complex ecosystem interactions, as well as the interaction between ecology and evolution. The questions reveal a dynamic science with novel subfields emerging.
10 Practice Questions Ecology W Answers
10 Practice Questions Ecology w Answers - Free download as PDF File (.pdf), Text File (.txt) or read online for free. Scribd is the world's largest social reading and publishing site.
PDF Biology Essay Questions And Answers
BIOLOGY ESSAY QUESTIONS WITH MARK SCHEMES 1. Explain the various ways in which a typical cell is adapted to its functions Has a cell membrane; with pores; that regulates substances entering and leaving the cell; cytoplasm; contain sugars and salts; for maintaining its osmotic pressure; also has a liquid
Identiﬁcation of 100 fundamental ecological questions
ades ago. 5. The list also contained a number of questions that have perplexed ecologists for decades and are still seen as crucial to answer, such as the link between population dynamics and life-history evolu-tion. 6. Synthesis. These 100 questions identied re ect the state of ecology today. Using them as an.
Ecology: Questions and Answers on Ecology
Q. 1. Define ecology. Ans. According to Haeckel (1869) ecology is "the science treating the reciprocal relations of organisms and the external world". Warming (1905) defined ecology as "the study of organisms in relation to their environment". Q.2. Give the names of five foreign ecologists of international fame.
132 questions with answers in POPULATION ECOLOGY
Population Ecology - Science topic. Population ecology is a sub-field of ecology that deals with the dynamics of species populations and how these populations interact with the environment. It is ...
Ecology Questions
They are always detailed, informative, clear, accessible and focused on the key details that stimulate the interest of students and teachers alike, whilst always focusing on what students need to be able to answer exam questions. 10/10 always. Well worth the subscription each year and save lots of teacher time. Keep up the excellent work.
Ecology Questions and Answers
Questions. State how excessive use of pesticides may affect soil fertility. The graph below represents a population growth of a certain herbivore in a grassland ecosystem over a period of time. Suggest three factors that could have caused the population change between C and D (3 marks) A biologist carried out a study to investigate the growth ...
PDF Lesson: Ecology Expert Practice test 1/27
Click on the food chain to make it bigger. Which of these organisms is considered a carnivore? Click all that apply. Heron Fish Great Diving Beetle
BIOLOGY TOPIC BY TOPIC QUESTIONS AND ANSWERS
Back to TOPICAL QUESTIONS & ANSWERS menu Updated on 6/12/2023. Join Kenya's Largest Teachers Telegram Group with Over 80K Teachers FORM 1-4 CLASS 7-8 GRADE 1-6 PP1-PP2 KASNEB PTE. Biology Topic By Topic Questions and Answers for All Topics in Form 1, Form 2, Form 3 and Form 4 for Kenya Secondary Schools in preparation for KCSE .
(PDF) EOC ECOLOGY SAMPLE QUESTIONS
Matter can recycle through the biosphere because a. matter does not change into new compounds. b. matter is assembled into chemical compounds. c. biological systems do not use up matter, they transform it. d. biological systems use only carbon, oxygen, hydrogen, and nitrogen. f2 Figure 3-1 _____10.
PDF Nurture your dreams
Ecology revision questions and answers Objective type questions 1 2015/1/3 The number of trophic levels in a food chain is mainly determined by the A. Deficiency of energy transfer between levels B. Biomass of the producer C. Net productivity of ecosystem D. Species diversity of the ecosystem
Ecology MCQ [Free PDF]
Ecology is the study of the interactions between living organisms and their environment. In this set of multiple-choice questions (MCQs) on ecology, you will explore the intricate web of relationships that exist in the natural world. These Ecology MCQ cover various ecological concepts, including ecosystems, food chains, and biodiversity. By answering these Ecology MCQ, you will deepen your ...
PDF February 2024 California Bar Examination Questions
Answer according to California and ABA authorities. FEBRUARY 2024 ESSAY QUESTIONS 4 AND 5. California Bar Examination. Answer both questions; each question is designed to be answered in one (1) hour. Also included in this session is a Performance Test question, comprised of two separate booklets, which is designed to be answered in 90 minutes.
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