1. What are some key features of the marine environment?

turbulence, extremes of temperature, light, high viscosity, salinity


2.  How do fish accomodate low temperatures in the water?

antifreeze type chemical in their blood


3.  How deep is one atmosphere of pressure?

33 ft.

4.  Why is it difficult for fish to take up oxygen at depth in the oceans?

less of it available


5.  How do organisms adapt to a low oxygen environment?

hemoglobin


6.  What is are adaptations that fish make in response to a lack of light?

more sensitive eyes


7.  How do fish in the ocean address the high salinity of seawater?

kidneys are able to deal with salinity


8.  What is the general change in pH with depth?

decreases with depth


9.  What challenges do marine organisms face with respect to friction?

viscosity,


10.  What adaptations do fish make to swim more efficiently?


11.  What are ways to classify marine environments?


12.  What are some examples of marine phyla?