________ are floating plants or animals
A) Benthos
B) Nekton
C) Flora
D) Terrestrial life
E) Plankton
Answer: E
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Every year, the clockwise circulation around the subtropical high helps to:
A) transport 40 million tons of dust from the Sahara Desert to the Amazon rainforest. B) deliver 20 million tons of carbon dioxide generated in Africa into the air above North America. C) speed ozone depletion by lifting CFCs into the stratosphere. D) lead hurricanes eastward across the Atlantic.
Genetic resistance to antibiotic drugs is an important example of
a. an adaptive trait in humans b. natural selection c. a beneficial mutation d. a harmful mutation e. Evolution
This figure shows the geologic timescale. Which period listed below would be part of the Cenozoic?
A. Triassic B. Cambrian C. Neogene D. Pennsylvanian E. Jurassic
Which of the following is a pull factor for urban growth?
A. High unemployment in cities B. Better access to education at big universities C. Unemployment in farming communities D. Jobs in rural manufacturing E. None of these is a pull factor for urban growth