In the context of ecosystem productivity, marine upwelling zones are important as they increase marine productivity by bringing the:
1. Decomposer microorganisms to the surface.
2. Nutrients to the surface.
3. Bottom-dwelling organisms to the surface.
Which of the statement(s) given above is/are correct?
1. Decomposer microorganisms to the surface.
2. Nutrients to the surface.
3. Bottom-dwelling organisms to the surface.
Which of the statement(s) given above is/are correct?
Important Questions on Environment and Ecology
Human activities in the recent past have caused the increased concentration of carbon dioxide in the atmosphere, but a lot of it does not remain in the lower atmosphere because of:
1. Its escape into the outer stratosphere.
2. The photosynthesis by phytoplankton in the oceans.
3. The trapping of air in the polar ice caps.
Which of the statement(s) given above is/are correct?
1. The ocean as a carbon sink would be adversely affected.
2. The food chains in the ocean would be adversely affected.
3. The density of ocean water would drastically decrease.
Select the correct answer using the codes given below:
1. Excretion of urea by animals
2. Burning of coal by man
3. Death of vegetation
Select the correct answer below.
With reference to the food chains in ecosystems, which of the following kinds of organisms is/are known as decomposer organisms/organisms? ·
1. Virus
2. Fungi
3. Bacteria
Select the correct answer using the codes given below:
1. A food chain illustrates the order in which a chain of organisms feed upon each other.
2. Food chains are found within the populations of a species.
3. A food chain illustrates the numbers of each organism which are eaten by others.
Which of the statements given above is/are correct?
