Which of the following is considered a key human made contributor to global warming?
a. carbon dioxide
b. hydrochlorofluorocarbons
c. nitrous oxide
d. ethane
e. surface ozone
a
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A group of organisms of the same species that live together in the same place make up a(n) ____
a. cell b. ecosystem c. tissue d. population e. biosphere
Transcription
a. involves both strands of DNA as templates. b. uses the enzyme DNA polymerase. c. results in a double-stranded end product. d. produces three different types of RNA molecules. e. fits all of these descriptions.
The prolonged low temperature exposure required for the germination of some seeds:a
is typical of coconuts. b. provides an alternative to the process of imbibition. c. prevents them from growing in flooded, anaerobic soils.
d. allows the seeds to conserve limited food stores. e. ensures that the seeds germinate in spring, rather than in fall.
In regards to a species' life history, opportunistic species
A. are long lived. B. provide extensive care for their offspring. C. are limited primarily by carrying capacity. D. reproduce later in life. E. produce many offspring.