Pleiotropic genes
a. act on secondary sexual characteristics.
b. influence more than one aspect of
phenotype.
c. are additive.
d. produce lethal effects when homozygous.
e. are none of these.
B
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Which of the following might be a result of adding a secondary consumer to the aquatic ecosystem illustrated above?
A) a decrease in the number of primary consumers B) a decrease in the population of decomposers C) an increase in atmospheric carbon dioxide D) an increase in the population of scavengers E) a decrease in the carbon sink
Helena’s doctor has advised her to take calcium supplements to help prevent:a
osteitis. b. osteoporosis. c. osteopenia. d. osteoarthritis
e. osteon disease.Iron-oxidizing bacteria grow better in alkaline environments where protons are less likely to abiotically convert Fe2+ into Fe3+
Indicate whether the statement is true or false.
Why don't all animals that group hunt show the same evolutionary trajectory?
What will be an ideal response?