A sequence of how many bases is needed to code for an amino acid?

A) 1
B) 2
C) 3
D) 4


C

Environmental & Atmospheric Sciences

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When chlorofluorocarbons are subjected to ultraviolet radiation, which of the following gases is released and rapidly destroys ozone?

A. nitrogen B. carbon C. carbon dioxide D. chlorine

Environmental & Atmospheric Sciences

Compared to the period of satellites in close Earth orbit, the periods of satellites farther away are

A. the same. B. longer. C. shorter. D. none of the above

Environmental & Atmospheric Sciences

D climates are found in the high latitudes of the Southern Hemisphere

Indicate whether the statement is true or false

Environmental & Atmospheric Sciences

This figure shows ages of seafloor. Which of the numbered sites is on the oldest seafloor, based on its position?

A. 1 B. 2 C. 3 D. 4

Environmental & Atmospheric Sciences