What is thought to help explain the evolution of the blood clotting mechanism?

a. constant mutations
b. direct response to environmental factors
c. gene duplication
d. sharing of gene pools between species
e. inbreeding


C

Biology & Microbiology

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Sex differences in body growth are mediated by changes in growth hormone, insulin-like growth factor I and

A. thyroid hormone. B. estradiol and testosterone. C. prolactin. D. progesterone. E. cortisol.

Biology & Microbiology

________ is the loss of soil under the force of wind and water

a. Phytoremediation b. Decomposition c. Bioremediation d. Soil erosion e. Leaching

Biology & Microbiology

In angiosperms, where does pollen production take place?

a. megasporangium b. antipodal cells c. microsporangium d. synergid cells

Biology & Microbiology

One of the most straightforward ways of detecting the presence of bacteria in food is to use ________.

A) a standard plate count B) spectrophotometry C) staining

Biology & Microbiology