The emergence of land plants correlated with the near ____ of the genes that bryophytes inherited from a(n)____
ancestor.
a. doubling; liverwort
b. doubling; algal
c. tripling; liverwort
d. tripling; algal
e. quadrupling; algal
ANSWER: b
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Which of the following statements concerning
fertilization in ferns is true? a. It occurs outside the egg-producing structure. b. It requires water. c. The fertilization product is haploid. d. A spore is the product of fertilization. e. None of these are true.
Recognition of self versus non-self is accomplished by ____
a. macrophage function b. complement system activation c. B and T cell cloning d. the presence of MHC markers on cell membranes e. memory cell formation
Why must tropomyosin cover the thin filament in just the right position before the muscle can relax?
A) It covers the myosin-binding sites and, if left exposed, will allow the myosin to bind and pull. B) Without tropomyosin in the correct position, calcium cannot be released. C) It is needed in the proper location, or ATP cannot be used. D) It has a particular binding place that facilitates the removal of calcium.
Identify some differences between meiosis in men and women.
Fill in the blank(s) with the appropriate word(s).