Which of the following subatomic particles has appreciable mass and lacks a charge?
a. neutron
b. element
c. electron
d. proton
e. molecule
Ans: a. neutron
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What factor is NOT involved in the movement of
water through a plant? a. transpiration pull b. the cohesion of water molecules c. hydrogen bonds d. the replacement of lost water molecules e. active transport
A graph illustrating the proportion of individuals in a population that live to a given age is called a(n):
a. survivorship curve. b. exponential growth curve. c. growth curve. d. "death isocline." e. logistic curve.
The rate at which mitosis occurs varies dramatically for different types of cells. The most rapid cell division occurs:
a) in the blood and the heart. b) on the skin. c) in the gametes. d) in the blood and the cells lining the various tissues of organs. e) in the liver and the brain.
Which of the following statements best explains why the waters over continental shelves have more nutrients than the open ocean?
A. Sunlight penetration is greater over continental shelves, making it more nutrient rich. B. The waters over continental shelves have more aquatic plants that provide nutrients. C. The open ocean has a greater concentration of consumers that deplete the water of nutrients. D. About 99% of seafood harvested by humans comes from the open ocean, thus depleting it of its nutrients. E. The water over the continental shelves are shallower so the nutrients remain in place.