Changes in community composition and structure over time are called
A) succession.
B) stratification.
C) zonation.
D) characterization.
A
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The major reasons for the decline of the Peruvian anchovy fishery were:
a. pollution and El Niño. b. political discord and pollution. c. pollution and overfishing. d. temperature decreases and El Niño. e. overfishing and El Niño.
The probability of producing a normal child by two parents who are carriers for an autosomal recessive disorder is
____.
a. 0% b. 25% c. 50% d. 75%
e. 100%What concept is used to express the growth rate of a
given population? a. doubling time b. population density c. population size d. carrying capacity e. biotic potential
Just before a duckling was about to hatch, a dog came along and chased the female duck off of the nest. When the duckling hatched it saw the dog. When the dog moved away from the nest, the duckling followed the dog. This is an example of
A. ethology. B. anthropomorphism. C. imprinting. D. a dumb duck.