For natural selection to be operating in a population, one of the things that must be present is a particular trait that must be capable of being passed on from parents to offspring. Another word for this is:
a) recessive.
b) inheritable.
c) mutable.
d) varying.
e) migrating.
Ans: b) inheritable.
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Which of the following is required by plants in the smallest quantity?
A. boron B. potassium C. phosphorus D. nitrogen E. sulfur
The Y chromosome was challenging to sequence because
A) it is very small. B) the sequence has many sites of high symmetry called palindromes. C) it is very similar to the X chromosome. D) not enough men volunteered to have their Y chromosomes sequenced.
Sewage pollution is especially problematic in coastal areas
a. that are sparsely populated. b. after drought. c. after prolonged rains. d. having fast moving currents.
Egg-laying mammals ____
a. hatch fully developed young from their eggs b. are monotremes c. are hairless d. are confined to South America e. bear their young into permanent pouches