The brown tree snake in Guam had a of about 100 snakes per hectare, which is approximately equal to two American football fields.
A. population
B. death rate
C. population density
D. growth rate
E. population distribution
C. population density
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On the outer surface of the plasma membrane there are marker molecules that identify the cell type. Often these molecules are
A. ATP. B. amino acids. C. nucleotides. D. carbohydrate chains. E. inorganic ions.
Which adaptation allows potential prey to hide from predators by having similar physical appearance to another less desirable animal?
a. mimicry b. camouflage c. warning coloration d. color changing abilities
In central Africa, the frequency of the sickle-cell allele has remained stable over the years because the allele protects against malaria. In the United States, malaria was eradicated by eliminating the mosquito that spreads the disease
The decreasing frequency of the sickle-cell allele in African Americans since malaria was eliminated in the United States is an example of A) stabilizing selection. B) genetic drift. C) the founder effect. D) disruptive selection. E) directional selection.
Gene amplification is the basis for ________
A) interstitial deletions B) formation of the translocation cross C) a segmental deletion D) the nucleolar organizing region E) bar-eyed flies