Declining amphibian populations are correlated with
a. habitat loss.
b. introduction of new species.
c. long-term changes in climate.
d. fungal infections and parasitic diseases.
e. all of these.
Answer: e
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When Darwin covered the tip of a grass seedling with metal foil and then illuminated it from one side, what happened to the seedling?
A. It bent away from the directional light. B. It did not respond to the directional light. C. It grew toward the light, as expected. D. It waved back and forth. E. It wilted and died.
Fibroblasts are present in which tissue type?
a. connective tissue b. epithelium c. muscle d. nervous tissue e. all tissue types
Chancroid
A. presents with a hard chancre. B. is caused by Haemophilus ducreyi. C. is very painful in both sexes. D. is caused by a spirochete.
Atropine, which is used to dilate the eye, inhibits acetylcholine muscarinic receptors.
a. true b. false