Males tend to be affected in greater numbers
by X-linked recessive genetic disorders than
are females because
a. females have two dominant genes for the
disorder.
b. males have only one X chromosome.
c. males have a double dose of the gene.
d. Y chromosomes are not as strong as X
chromosomes.
e. none of these
B
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Answer the following statements true (T) or false (F)
1.The type of animal behavior that is inborn and does not require experience or learning to be performed correctly is innate behavior. 2.Imprinting is a kind of rapid learning that occurs only during a restricted time, early in the life of an animal. 3.In almost all cases, innate and learned behaviors are determined by both genetics and environment. 4.The scientific study of animal behavior is ethology. 5.If an individual reduces its own fitness for the survival of and reproduction of nondescendant relatives is termed kin selection.
Four of the five interactions listed below are
relationships in which at least one of the participants benefits. Select the exception. a. competition b. parasitism c. mutualism d. commensalism e. predation
Which of the following statements is consistent with the hypothesis that certain eukaryotic organelles originated as prokaryotic endosymbionts?
A) are roughly the same size as bacteria. B) can be cultured on agar since they make all their own proteins. C) contain circular DNA molecules. D) have ribosomes that are similar to those of bacteria. E) A, C, and D
In which soils do most plants do best?
a. sandy soils b. soils made mostly of humus c. clay soils d. loams