The world's tallest and longest-lived trees are:
a. oaks.
b. conifers.
c. cycads.
d. maples.
e. ginkgos.
Answer: b. conifers.
Biology & Microbiology
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Tetanus prevents the release of neurotransmitters from
A. muscle cells. B. excitatory neurons. C. inhibitory neurons. D. tetano cells.
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The letter “B” in the above figure represents
a. cortex. b. cornea. c. fovea. d. blood vessels. e. optic nerve.
Biology & Microbiology
Which of the following is a water-soluble vitamin?
a. vitamin A b. B-complex vitamins c. vitamin D d. vitamin K e. vitamin E
Biology & Microbiology
What is the role of an enzyme in a cell?
A. To speed up chemical reactions B. To become consumed during a chemical reaction C. To increase the energy required to make a reaction occur D. To provide energy to the cell
Biology & Microbiology