Which of the following plant hormones prevents plant tissues from senescing, or aging?
A. ethylene
B. cytokinin
C. gibberellin
D. abscisic acid
E. auxin
Answer: B
Biology & Microbiology
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Until recently, most animal clones had serious health problems, such as ____
a. enlarged organs b. reduced brain size
c. trouble gaining weight d. enlarged organs and obesity e. reduced brain size and trouble gaining weight
Biology & Microbiology
With __________, gametes are typically released into water. Fill in the blank(s) with the appropriate word(s)
Biology & Microbiology
Adenine and guanine are
a. nitrogenous bases. b. base pairs bonded together in DNA. c. bases found only in RNA. d. waste products of protein synthesis. e. amino acids.
Biology & Microbiology
During pregnancy and menopause, the rate of urinary tract infections increases because of
a) decreased estrogen. b) higher acidity. c) increased estrogen. d) immunosuppression.
Biology & Microbiology