As fall approaches, whitetail deer begin to accumulate a layer of body fat. This is an example of which characteristic of life?
What will be an ideal response?
response to the environment
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In some instances environmental change causes a situation where one phenotype is favored for a period of time, and then a different phenotype is favored. This oscillating selection causes
A. the maintenance of genetic variation in the population. B. an increase in point mutations. C. elimination of rarer genotypes because of uneven selection. D. extinction of the population. E. high population increase to maintain phenotypic variation.
The photosensitive sensory organ for a flatworm is a(n):
A. compound eye. B. single-lens eye. C. eyecup. D. ommatidia.
An enzyme’s specificity is based on
a. the shape of its active site. b. the amount of activation energy it requires. c. the number of amino acids in its structure. d. the nature of its cofactors. e. none of these.
Vast numbers of microorganisms are being genetically characterized without culturing them in the laboratory today through ________.
A. metagenomic sequencing B. mass spectrometry and proteomics C. column chromatography D. polymerase chain reaction