The niche of a fish is defined by ______________.
a. temperature
b. salinity
c. pH
d. other species of fish
e. All of the above
f. I don't know the answer
Ans: e. All of the above
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In what type of mating system would sexual dimorphism be unlikely?
A. monogamy. B. polygyny. C. polygamy. D. polyandry. E. polygamy and polyandry.
The primary reason for hybrid sterility is
a. the inability of the hybrid to attract a mate. b. the difficulty in finding a suitable habitat in which to survive. c. that the hybrids are usually weak and have difficulty surviving to reproductive maturity. d. that hybrids cannot produce viable gametes. e. the inability of the hybrid to develop an appropriate courtship pattern.
Most evidence indicates that skin color is controlled by how many gene pairs?
A. One B. Two to three C. Three to four D. Five to seven E. More than twelve
In regards to a species' life history, opportunistic species
A. are long lived. B. provide extensive care for their offspring. C. are limited primarily by carrying capacity. D. reproduce later in life. E. produce many offspring.