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
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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.
________ is the loss of soil under the force of wind and water
a. Phytoremediation b. Decomposition c. Bioremediation d. Soil erosion e. Leaching
In angiosperms, where does pollen production take place?
a. megasporangium b. antipodal cells c. microsporangium d. synergid cells
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