If an individual for whatever reason cannot
pass on its genes to offspring, the best
alternative is to show altruism to
a. relatives.
b. strangers.
c. neighbors.
d. other species.
e. competitors.
A
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In chordates, which mesoderm structure forms during gastrulation and provides structural rigidity along the dorsal anterioposterior axis of the embryo?
A. archenteron B. neural tube C. notochord D. epidermis E. intestinal tract
Which type of cell has the fewest number of chromosomes?
a. somatic b. gametes c. archaea d. diploid
Refer to Figure 10-2. The chromosome complement of item 6 in the life cycle is:
a. twenty.
b. haploid.
c. diploid.
d. forty-eight.
e. four.
Infectious mononucleosis is caused by ________
A) blood doping B) lead poisoning C) Epstein-Barr virus D) pernicious anemia