What second messenger is directly involved in activating protein kinase C (PKC)?
A. DAG
B. cAMP
C. cGMP
D. Phospholipase C
E. G protein
A. DAG
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Humans cannot survive at sea by drinking salt water. However, marine vertebrates such as sea turtles and various sea birds can survive by drinking salt water. What do they have that humans do not?
A. Kidneys that are extremely good at producing a concentrated urine B. Body fluid concentrations that are similar to or greater than those of seawater C. The ability to secrete salts and wastes into their intestinal contents like an insect D. They use ammonia as their primary nitrogenous waste E. Salt glands
The moraines left when glaciers retreat are characterized by
A. year-round ice. B. low nitrogen content and little organic matter. C. rich, fertile soil. D. high levels of nitrogen, phosphate and carbon.
Even though coastal areas comprise only 10% of the oceans' area, they make up ____% of the total oceans' fisheries
a. 10 b. 20 c. 60 d. 90 e. 50
The protists most closely related to animals and fungi are the ciliates
Indicate whether the statement is true or false.