Using identical twins to study heritability is complicated by the fact that:
A. identical twins often experience identical
uterine environments, whereas fraternal twins
do not.
B. identical twins are often treated more
similarly to one another than are fraternal
twins.
C. fraternal twins often share the same
uterine environment, whereas identical twins
do not.
D. identical twins often experience a more
similar uterine environment and more similar
treatment during childhood than do fraternal
twins.
E. even identical twins are sometimes
genetically different from one another.
D
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Sensory transduction of light in the vertebrate retina is accomplished by _____
A) ganglion cells B) amacrine cells C) bipolar cells D) horizontal cells E) rods and cones
Which backyard would you predict to have the greatest diversity of birds?
A) one with newly planted seedlings B) one with 5- to 10-year-old trees C) one with 25- to 50-year-old trees D) one with 60- to 100-year-old trees
Genes in their natural state cannot be patented. This policy allows research and use of natural products for the common good. What argument might be presented in favor of patenting genes or gene products?
What will be an ideal response?
If light rays are not focused evenly on the retina, a fuzzy image is formed. This condition is called
A. astigmatism. B. nearsightedness. C. farsightedness. D. cataracts. E. conduction deafness.