The main stimulus for phototropism is light of ____ wavelengths
a. red
b. green
c. yellow
d. blue
e. far red
ANSWER: d
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A well-substantiated explanation of some aspect the natural world, based on a body of facts that have been repeatedly confirmed through observations and experiments, is referred to as a(n) ________.
A. hypothesis B. theory C. fact D. idea
The ____________________ provides a means of measuring allele frequencies in the population. Fill in the blank(s) with the appropriate word(s)
When nondisjunction occurs early in embryogenesis rather than gametogenesis, what would you expect in the resulting karyotype?
A) monosomy B) trisomy C) mosaicism D) uniparental disomy E) random X-inactivation
The adjustable ring of contractile and connective tissues that controls the amount of light entering the eye is the ____.
A. lens B. cornea C. pupil D. iris E. retina