Fluorescence microscopy has been helpful in observing:

A. attachment of pollen grains to the anther
B. pollen tube development in the style
C. time involved in pollen release from anthers
D. location of pollen within the anther
E. The size of pollen grains


B. pollen tube development in the style

Biology & Microbiology

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An example of an inhibitory neurotransmitter is

A) acetylcholine. B) epinephrine. C) dopamine. D) GABA. E) insulin.

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Sickle-cell anemia has been traced to what type

of mutation?

a. frameshift b. base-pair substitution c. mutagenic d. transposable element e. viral

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Radioactive dating techniques have demonstrated that Earth was formed approximately ________ years ago

A) 10 billion B) 46 million C) 4.6 million D) 4.6 billion

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The search for a(n) ____ treatment led to the discovery that DNA carries genetic information

a. pneumonia b. AIDS c. tuberculosis d. influenza e. SARS

Biology & Microbiology