Directional selection tends to _____ (select all that apply)
a. eliminate extreme forms of a trait
b. favor an extreme form of a trait
c. eliminate intermediate forms of a trait
d. favor intermediate forms of a trait
e. shift allele frequencies in one direction
B, E
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The part of the vertebra that transfers weight along the long axis of the vertebral column is (are) the
A) transverse process. B) spinous process. C) vertebral arch. D) vertebral body. E) vertebral pedicles.
Which animal uses positive pressure breathing to ventilate its lungs?
a. human b. lizard c. bird d. cat
e. salamanderIn the classic argument of ‘nature vs. nurture’, nature would most correspond with
a. genes. b. environment. c. divine intervention. d. environment and genes. e. genes, environment, and genes.
There is a strong correlation between stress and susceptibility to colds. What does this mean?
A) Stress must directly cause susceptibility to colds. B) A high susceptibility to colds must directly cause stress. C) People with high stress must come into contact with more cold viruses. D) Stress might or might not affect susceptibility to colds.