Its defoliant effects were first noticed when it leaked from gas lights; later found to be produced by plants themselves.
Choose the letter of the best match:
A. abscisic acid
B. auxin
C. ethylene
D. cytokinin
E. gibberellin
C. ethylene
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The most reasonable explanation for the fact that disorders such as cystic fibrosis do not disappear
from the human population is that a. it is an autosomal dominant disease. b. new medical procedures allow most sufferers to live long enough to pass the gene on to offspring. c. heterozygous carriers have one normal gene that masks the harmful gene. d. the gene keeps mutating back to the harmful form. e. persons with cystic fibrosis are made stronger by their affliction.
Which of these symptoms is NOT consistent with decreased aldosterone secretion?
A. excessive urine production B. low blood pressure C. high plasma potassium levels D. high plasma sodium levels
The primary function of cell-mediated immunity is to
A) protect the body against extracellular parasites. B) decrease the amount of complement. C) destroy cancerous or virus-infected host cells. D) increase the number of macrophages. E) promote the production of antibodies.
Total amount of kinetic energy DUE TO molecular motion is ____________
Fill in the blank(s) with the appropriate word(s).