Some mammals have been shown to be particularly attracted to mating partners that carry a different complement of immune system alleles than themselves. Which hy-pothesis does this observation support best?
a. the red queen hypothesis
b. the Fisher–Muller hypothesis
c. Muller's ratchet
d. sex as an adaptation to environmental unpredictability
A
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The facial nerve controls facial expression muscles and conveys taste from the tongue, which are _________ and _________ parts of the nervous system
A. somatic; voluntary B. somatic; involuntary C. autonomic; voluntary D. autonomic; involuntary
The most common vector-borne disease in North America and Europe transmitted by the bite of Ixodes ticks is caused by:
a. Leptospira interrogans. b. Borrelia burgdorferi. c. Treponema carateum. d. Rickettsia rickettsii.
Each tRNA has an __________ that base-pairs with a codon, and each binds to the kind of amino acid
specified by the codon. Fill in the blank(s) with the appropriate word(s).
Many species of snakes lay eggs. However, in the forests of northern Minnesota, where growing seasons are short, only live-bearing snake species are present
This trend toward species that have live birth in a particular environment is an example of _____. A) an exaptation B) sexual selection C) species selection D) goal direction in evolution