The order of whorls from the flower's periphery to the center is:
a. sepals, petals, stamens, and carpels.
b. carpels, petals, stamens, and sepals.
c. petals, carpels, stamens, and sepals.
d. sepals, carpels, stamens, and calyx.
e. calyx, carpels, stamens, and sepals.
A
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Coenzyme A, which assists in the production of acetyl CoA during the citric acid cycle, is made from which of the following vitamins?
a. vitamin A b. vitamin B5 c. vitamin C d. vitamin D
How many different classes of neurons are
involved in most nervous systems?
a. 1 b. 2 c. 3 d. 4 e. 5
Before you inhale, the pressure inside your alveoli is ____
a. 0 mm Hg b. greater than atmospheric pressure c. less than atmospheric pressure d. equal to atmospheric pressure e. not yet connected to atmospheric pressure
Eastern and Western meadowlarks look almost identical and sometimes inhabit the same areas of prairies. These birds recognize members of their own species by distinctive songs and thus do not breed with each other. This is an example of
A) temporal isolation. B) ecological isolation. C) behavioral isolation. D) mechanical isolation. E) geographic isolation.