Until about 10,000 years ago, our species depended on ________
A) hunting and herding
B) cattle and goats
C) hunting and gathering
D) crops and cattle
E) crops
Answer: C
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The incident light ray, the reflected light ray, and the normal between them
A) lie in the same plane. B) may or may not lie in the same plane. C) lie in planes that are perpendicular to one another.
An examination of a typical 500 mb height map shows that:
A) pressure surfaces can change dramatically over a short distance. B) there is no usefulness in consulting height maps for other pressures. C) upper-atmosphere gradients are typically small. D) it takes strong gradients to produce strong winds.
Because of a growing population of people and increased interests in fishing, a lake in Florida is experiencing increased harvests of the bass population
To better manage the bass population, ensure sustainability, and continue to draw tourists to this popular lake, the state wildlife agencies determine that all fishing in the lake should be stopped for 5 years. Using lessons from the study of the Santa Cruz River in Arizona, the approach to this Florida lake problem would be better if the A) local people were involved in determining how best to manage the fishing in this lake. B) federal government banned fishing every other year for the next 20 years. C) decisions about the management of this ecosystem were left up to the tourist industry. D) population of fish was instead managed to keep the bass population near carrying capacity.
The total number of plant and animal species that a field biologist identifies along a mountain trail is an example of ________
A) species composition B) structural diversity C) species evenness D) species richness E) genetic diversity