The urine of marine mammals is ____ when compared to ____
a. hypoosmotic; seawater
b. hypoosmotic; their body fluids
c. hyperosmotic; seawater
d. isoosmotic; their body fluids
e. isoosmotic; seawater
C
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The most important ion in controlling the movement of water into and out of the guard cells is
A. hydrogen. B. carbon. C. nitrogen. D. sodium. E. potassium.
A creature that does NOT have an endoskeleton is the
A. beetle. B. crocodile. C. sea sponge. D. starfish. E. shark.
Given the structure of the anti-HIV drug azidothymidine (AZT), how do you think it blocks viral replication?
a. It blocks RNA synthesis b. It inhibits host T cells from replicating c. It inhibits the assembly of new viruses in the cell d. It blocks DNA synthesis e. It prevents HIV from entering the cell
A lichen is a symbiotic relationship between cyanobacteria and fungi.
Answer the following statement true (T) or false (F)