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BIO304 GENERAL ECOLOGY
CERDIT UNIT: 2
TIME: 2 HOURS
INSTRUCTION: ANSWER ANY FOUR QUESTIONS
1ai. List the major nutrients in an ecosystem that are cycled and recycled by living organisms.
ii. Describe the roles played by space and predator-prey interaction on population regulation.
b. i. Outline the main periods of human population increase.
ii.What are the harmful effects of decreasing the earth’s ozone layer.
2ai.Name the biomes known for the following:
(i) wheat production (ii) lumbering (iii) trapping and (iv) tallest trees in the world.
ii. Explain the process of the following:
(i) ammonification (ii) nitrification (iii) nitrogen fixation
bi. Define the term biome.
ii. Describe the human population pyramid.
3ai.What do you understand by the term community?
ii. Compare the tropical rain forest and the savanna in terms of rainfall, animal types, vegetation and burning by fire
b. Describe the structure of communities.
4ai. Define pollution.
ii.Photosynthetic plants are of gross importance in the ecosystem, Discuss.
bi. Explain how phosphorous cycle differs from other nutrient cycles?
ii Describe how energy transfer occurs in an ecosystem.
5ai. List the important climatic factors that determine the distribution of terrestrial biomes.
ii. How does the explosive growth of human population affect the environment?.
bi. Define the term ecological succession.
ii. Write short notes on the following:
(i) pyramid of biomass (ii) pyramid of energy (iii) pyramid of numbers
6ai. Define the biogeochemical cycles
ii. Humans are considered to be the initiators of secondary succession, discuss.
bi. Explain the interaction between the nutrient cycles.
ii. Distinguish between the following:
density independent factor of population regulation.
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You can now use you matric number to login as your username and password in a lowercase.
https://elearn.nouedu2.net/login/
Note that you are to change your passw...
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