The most recent ancestral form or species from which two different species evolved is known as ________________________.
A. a common ancestor.
B. an embryonic stage.
C. development.
D. evolution.
Select your answer:
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The Human Eye › ViewWhat transfers the signals from your eyeball to your brain?
A. Olfactory nerve
B. Auditory nerve
C. Optic nerve
D. Spinal cord
Genetics › View
The frequency of heterozygosity for the sickle-cell anemia allele is unusually high, presumably because this reduces the frequency of malaria. Such a relationship is related to which of the following?
A. Mendel’s law of independent assortment
B. Mendel’s law of segregation
C. Darwin’s explanation of natural selection
D. Darwin’s observations of competition