General Ecology MCQs

By: Prof. Dr. Fazal Rehman | Last updated: May 14, 2025

1. : A single bacterium in the soil interacts with.
(A) The water
(B) Air
(C) Particles of soil around it
(D) All of the above

2. : The organism that depends on plants for food and energy is called as.
(A) Consumer
(B) Decomposer
(C) Carnivorous
(D) Insectivorous

3. : Terrestrial biomes have a rapid exchange of.
(A) Carbon dioxide
(B) Oxygen
(C) Water
(D) All of the above

4. : The net amount of energy that is fixed by plants is called.
(A) Gross primary production
(B) Net energy
(C) Net production
(D) Gross usage

5. : The following is an example of Terrestrial Biome.
(A) Tropical rainforest
(B) Rivers
(C) Streams
(D) All of the above

6. : Which of the following is the example of primary producers in the ecosystem?
(A) Animal
(B) Plants
(C) Fungi
(D) Arthropods

7. : Energy _____ in an Ecosystem.
(A) Is released
(B) Is absorbed
(C) Flows
(D) All of the above

8. : Movement of matter through the ecosystem is called.
(A) Biogeochemical cycle
(B) Chemical cycle
(C) Biological cycle
(D) Geothermal cycle

9. : Which of the following is the smallest unit of Ecosystem?
(A) Ionosphere
(B) Lithosphere
(C) Biosphere
(D) Mesosphere

10. : Movement of matter through the ecosystem is called.
(A) Biological cycle
(B) Chemical cycle
(C) Biogeochemical cycle
(D) Geothermal cycle

11. : The Biosphere consists of the following.
(A) Lakes
(B) Soils
(C) Solid sediments
(D) All of the above

12. : Communities along with their physical environments are known as.
(A) Ecology
(B) Ecosystem
(C) Population
(D) Species