Early signs or symptoms of breast cancer include:
A) a small, painless lump in the breast.
B) swollen lymph glands in the axilla.
C) significant weight loss and vomiting.
D) nipple discharge and breast tenderness.
Answer: A) a small, painless lump in the breast.
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When a pigment molecule absorbs light energy,
a. it becomes more stable. b. it may gain an electron. c. an electron from an inner energy level may move to another level. d. an electron from an outer energy level may move to an inner level. e. a proton may be ejected from the nucleus of the atom.
Which of the following occurs in situations where more than one hormone produces the same effects at the target cell and their combined effects are amplified?
A) antagonism B) permissiveness C) synergism D) summation
Acetylcholine is a
A. neurotransmitter. B. hormone. C. synthetic drug. D. pigment.
The common term for the action of transferring pollen grains from an anther onto a stigma is:
a. pollination. b. fertilization. c. reproduction. d. intercourse. e. None of the above is correct.