When a sudden change in the environment, such as a flood or fire, reduces the size of a population, the survivors' collective gene pool will be only a limited representation of what was present before the disaster. This phenomenon is called:
a) the Hardy-Weinberg effect.
b) the genetic load.
c) the founder effect.
d) the bottleneck effect.
e) the mutation effect.
Ans: d) the bottleneck effect.
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What information is used to calculate the age-specific fertility rate, mx?
A. the net reproductive rate of females B. total number of offspring born to females within a reproductive age class C. the per capita growth rate of all females D. number of female offspring born to females within a reproductive age class E. the average age of first reproduction for females
Although sexual reproduction has a higher metabolic cost than asexual reproduction, many organisms use it. Why is it adaptive?
What will be an ideal response?
Which of the following was the first
invertebrate listed as endangered by the US Fish and Wildlife Service?
a. marine mollusk b. white abalone c. Atlantic lobster d. sea anemone e. blind crab
what is the mode of action for quinolones and metronidazol?
What will be an ideal response?