What is the main way that sharks and rays deal with the osmotic stress of living in seawater?
a. by active transport of ions out of the body by chloride cells
b. by maintaining high levels of urea and trimethylamine oxide in body fluids
c. by active transport of ions into the body through the gills
d. by excreting nitrogenous wastes through their kidneys as urea
Answer: b. by maintaining high levels of urea and trimethylamine oxide in body fluids
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A. Maltose B. Sucrose C. Lactose D. Fructose E. Glycogen
Glucose is stored in plants as _________ and in animals as _________
A. glycogen; starch B. cellulose; glycogen C. starch; cellulose D. starch; glycogen E. cellulose; starch
A measure of the average kinetic energy of the molecules making up a substance is known as
A. temperature. B. heat. C. potential. D. phase of matter.
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