Question

Which of the following statements is/are true about abyssal zone?

• A. This zone is dark and cold throughout the year.
• B. 80% of marine flora and fauna are found in this region.
• C. The organisms living in this region are floaters and swimmers.
• D. Photosynthesis is absent in this region.

Answer 1

Answer: (A), (D)

The correct options are
A This zone is dark and cold throughout the year.
D Photosynthesis is absent in this region.

The abyssal region is the deepest layer in marine ecosystem. This zone is cold and dark throughout the year. Since it is the deepest layer with no sunlight, photosynthesis is absent in this region.
Floaters and swimmers are usually found in the euphotic zone. It also contains 80% of the marine flora and fauna.