Identical twin raccoons are raised in different environments and yet behave very differently. This is an example of
A) heterozygous alleles.
B) the norm of reaction.
C) genetic differentiation.
D) acclimation.
B
Biology & Microbiology
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To which subtype of muscle tissue does a fiber with cross-striations and many peripherally located nuclei belong?
(a) skeletal. (b) cardiac. (c) smooth. (d) none of the above.
Biology & Microbiology
Sponges are
A. prokaryotic bacteria. B. the simplest animals. C. the most complex protists. D. plants. E. not alive.
Biology & Microbiology
In a cross involving plants with round/wrinkled
seeds, yellow/green pods, and tall/dwarf stems, the researcher is actually observing __________traits. a. 4 b. 3 c. 6 d. 12 e. none of these
Biology & Microbiology
Refer to Figure 44-3. A semilunar valve regulates blood flow into which structures?
a. 1 and 2 b. 1 and 5 c. 1 and 7 d. 2 and 7 e. 7 and 11
Biology & Microbiology