Which process provides the genetic variability that natural selection acts on during evolution?
a. fitness
b. mitosis
c. mutation
d. adaptation
e. artificial selection
c
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The first genetic trait described in humans was ____
a. albinism b. dwarfism c. Marfan syndrome d. multiple sclerosis e. brachydactyly
The strongest chemical bonds are
A. hydrogen bonds. B. Van der Waal forces. C. hydrophobic interactions. D. ionic bonds. E. covalent bonds.
Disulfide bonds contribute to the ___________ structure of insulin
a. primary and secondary b. secondary and tertiary c. tertiary and quaternary d. secondary, tertiary, and quaternary
Figure 42.11
Use the figure above showing human embryonic developmental day 14 to answer the following question.
The structure that later becomes part of the placenta is indicated by ____.
A. A B. B C. C D. D E. E