When the growth rate of a population tapers off at a certain point and remains at the same point indefinitely, the population is said to have reached the
A. maximum population size.
B. carrying capacity.
C. biotic potential.
D. lag phase.
Answer: B
Biology & Microbiology
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a. A. b. B. c. C. d. D. e. none of these.
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Which of the following is a modified fatty acid?
a. prostaglandin b. cyclic AMP c. thyroid hormone d. epinephrine e. melatonin
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All of the following are components of nonspecific immunity EXCEPT
A. complement. B. B cells. C. skin. D. lysozyme. E. phagocytes.
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Which of the following is a common source of heavy metals introduced into natural ecosystems?
A) refuse from mining and smelting operations B) waste products of manufacturing processes C) fungicides D) by-products of burning of leaded fuels E) all of the above
Biology & Microbiology