Reference no: EM133483887

Question

1. The deep scattering layer shown in the diagram below rises toward the surface in the evening and sinks again at dawn. How do deep sea organisms use this oceanic phenomenon to their benefit?

2. Describe two ways fish swim to help protect themselves from predators.

3. Bottom sediment exerts strong control on the make-up of the benthic community.

__________ tend to live where there is a sandy bottom and _________

__________ tend to live where there is a muddy bottom.

Benthic abundance increases/decreases (circle or underline the correct answer) with depth, but diversity increases/decreases (circle or underline the correct answer).

4. List the four sources of organic matter that find its way to the seafloor and serve as foodstuffs for deep-sea organisms.