A gaseous hormone produced by plants that helps control fruit ripening is

A. carbon dioxide.
B. auxin.
C. ethylene.
D. chlorophyll.
E. carotene.


C. ethylene.

Biology & Microbiology

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ALL positive HIV-EIA tests must be confirmed by another independent test, usually the HIV Western blot

Indicate whether the statement is true or false.

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Severe acute respiratory syndrome (SARS)

A. is classified as an opportunistic infection. B. causes high fever, pneumonia, and respiratory distress. C. began with an initial outbreak in the United States and then spread to Canada and China. D. is caused by the respiratory syncytial virus.

Biology & Microbiology

After the mature follicle releases the egg, the remaining follicle cells form the ________

Fill in the blank(s) with correct word

Biology & Microbiology

A paracrine signal that relaxes smooth muscle cells is

A) nitric oxide. B) vitamin D. C) testosterone. D) cortisol. E) antidiuretic hormone

Biology & Microbiology