Overexploitation occurs as a result of ____
a. harvesting of predators
b. transformation of an ecosystem to a desert
c. soil nutrient loss
d. the combined outcome of desertification and global warming
e. excessive harvesting of an animal or plant species
ANSWER: e
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Which of the following releases substances that
initiate blood clotting? a. lymphocytes b. basophils c. erythrocytes d. neutrophils e. platelets
If flagellar rotation of Escherichia coli cells is ________, then CheA is ________.
A. clockwise; unphosphorylated B. clockwise; autophosphorylated C. counterclockwise; unphosphorylated D. counterclockwise; autophosphorylated
Genotypic and allele frequencies for a gene that determines neck length in giraffes are measured and found to be identical in three successive generations. From this data it is reasonable to conclude that, with respect to the gene for neck length, the population is in Hardy-Weinberg equilibrium.
a. true b. false
Honeybees are able to discriminate between different flowers using
A) color vision. B) a single lens. C) eye cups. D) basilar membranes.