A molecule of chlorophyll increases in potential energy when one of its electrons is boosted to a higher-energy excited state on being struck by a photon of light
a. true
b. false
Ans: a. true
Biology & Microbiology
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Which of the following are considered to be good sources of protein?
a. vegetables b. meats, nuts c. dairy products, fats
Biology & Microbiology
The most common of the sexually transmitted viral diseases agents is
A. human papillomavirus. B. herpes virus. C. human immunodeficiency virus. D. leptospirosis.
Biology & Microbiology
Most dinosaurs were extinct by ____ years ago
a. 10,000 b. 1 million c. 500 million d. 65 million e. 1 billion
Biology & Microbiology
When sampling a species that has clumped distributions, which approach listed below is best?
A) sampling at random locations B) counting every individual C) calculating an ecological density D) assuming a uniform distribution
Biology & Microbiology