Which is the best description of the niche of a salmon?
a. the Columbia River
b. salinities between 0 and 3000 ppm
c. March through September
d. All of the above are equally good descriptions of the niche.
e. I don't know the answer
Ans: b. salinities between 0 and 3000 ppm
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A common adaptation of coastal plants that grow on sand dunes is
A. deep roots to extract moisture. B. broad leaves for enhanced photosynthesis. C. secretion of proteinaceous threads. D. increased transpiration of water. E. elevated growth rates.
In the early years of the twentieth century, ____ proposed that some genetic disorders and abnormalities of
metabolism are related. a. Sir Archibald Garrod b. Francis Crick c. Linus Pauling d. Linda Bartoshuk e. Gregor Mendel
Which statement about an individual that is homozygous for an allele is not true?
a. Each of its cells possesses two copies of that allele. b. Each of its gametes contains one copy of that allele. c. It is true-breeding with respect to that allele. d. Its parents were necessarily homozygous for that allele. e. It can pass that allele to its offspring.
Discuss the importance of there being two types of adaptive immune responses (antibody and cell-mediated).
What will be an ideal response?