Which of the following can prevent amebiasis?
A. Avoidance of food or water that might be contaminated with human feces in endemic areas
B. Flagyl
C. UV light treatment of water
D. All of the choices are correct.
Answer: A
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Genetic manipulation has enabled chestnut trees to
a. develop resistance to a blight. b. develop resistance to insects. c. flower earlier in the season. d. grow faster
In temperate regions of the Northern Hemisphere, north-facing slopes are less humid than south-facing slopes
Indicate whether the statement is true or false
Species A prefers a more dry habitat but grows in a wet habitat. Why might this be?
A) Species B outcompetes A in the dry habitat. B) Species A's fundamental niche is restricted to a wet habitat. C) Species A requires large amounts of moisture to grow. D) Species B prefers a wet habitat.
Which group of organisms has the greatest percentage of species in danger of extinction, according to the International Union for Conservation of Nature (IUCN)?
A) plants B) mammals C) birds D) reptiles