Practice Ecology and Environment – GK Quiz with Answers – Level 2

Which of the following is NOT an abiotic component of an ecosystem?

Match List-I with List-II.

Select the correct answer using the codes given below.

Why do the feeding relationships in nature usually form a food web rather than a single straight food chain?

Food chains usually have only three or four steps. What is the main reason for this?

Consider the following statements about energy in an ecosystem:

1. In a terrestrial ecosystem, green plants convert only about 1% of the sunlight falling on their leaves into food energy.

2. Energy that passes to a higher trophic level can flow back to the lower trophic level.

Which of the statements given above is/are correct?

Which feature of certain pesticides allows them to build up at each trophic level?

Arrange the following stages in the path of a pesticide used on crops in the correct sequence:

1. Taken up by plants and aquatic organisms

2. Enters the soil and water

3. Accumulates in the highest amount in humans

Select the correct sequence.

Consider the following statements about ozone:

1. A molecule of ozone is made up of three atoms of oxygen.

2. Ozone in the upper atmosphere shields the earth from the Sun's ultraviolet radiation.

3. Ultraviolet radiation is harmless to human skin.

Which of the statements given above is/are correct?

Chlorofluorocarbons (CFCs), which were linked to ozone depletion, were used mainly in:

In 1987, which organisation brought about an agreement to freeze the production of CFCs?