The guppy behavior studies presented in your text, including the transfer experiments of guppies between high predation and low predation sites illustrates:
a. rapidity with which natural selection can operate.
b. significant differences in behavior have evolved in populations separated by only 10,000 years.
c. significant differences in behavior have evolved in populations due to predation stress.
d. All of the above.
e. None of the above.
D
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The density of woody vegetation in a savanna is controlled through
A) mean annual temperature. B) mean annual temperature, soil texture, and water-holding capacity. C) mean annual precipitation. D) mean annual precipitation, soil texture, and water-holding capacity.
All germicides are capable of killing all pathogenic organisms and endospores.
Answer the following statement true (T) or false (F)
Triiodothyronine (T3) is secreted by
a. pancreatic islet cells. b. the thyroid gland. c. the pituitary gland. d. the adrenal medulla. e. the adrenal cortex.
This pancreatic enzyme breaks triglycerides into glycerol and fatty acids
A) trypsin B) carboxypeptidase C) lipase D) maltase