The greatest concentration of nitrogen on earth

is found in



a. living organisms, including bacteria.
b. the atmosphere.
c. soil minerals.
d. fossil fuels.
e. oceans.


B

Biology & Microbiology

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Which explanation is NOT a reason for why Hawaiian honeycreepers are vulnerable to extinction

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A circular DNA molecule with two restriction enzyme cut sites will yield three fragments on digestion

Indicate whether the statement is true or false

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In cases of acute appendicitis, if the appendix is intact when it is removed only a single dose of antibiotic given at the time of surgery is necessary

Indicate whether the statement is true or false

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Which of the following is true of zinc?

a. It binds to most proteins in the body. b. Grains are the most reliable food sources of zinc. c. Excess zinc can decrease copper absorption. d. All of its functions involve it acting as a co-factor for enzymes.

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