Before a sperm can participate in fertilization, it must undergo ____ in the female reproductive tract
a. the acrosome reaction
b. the cortical reaction
c. spermatogenesis
d. determination
e. capacitation
e
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Which statement is true about the development of the theory of evolution?
A. Evolution from a common ancestor was proposed 100 years before Darwin's Origin of Species. B. Darwin was the first to propose evolution. C. In Darwin's time most people believed that different organisms evolved from a common ancestor, but they did not know how. D. Initial experiments performed by Darwin did not support his hypothesis.
Which of the following terms cannot be used to characterize eukaryotic chromosomes?
a. bathed in cytoplasm b. DNA plus proteins c. condensed d. "colored bodies" e. duplicated
Roughly a quarter of all known species are currently threatened with extinction. What is the primary source of this threat?
What will be an ideal response?
Mycoplasma are among the smallest and perhaps the simplest self-replicating prokaryotes known. M. genitalium contains a genome of 0.58 Mb. Approximately how many genes does this bacterium contain?
A) 12 B) 426,000 C) between 400 and 550 D) 3000 E) 1200