While on a hike in the forest, you notice that some trees have leaves with small brown spots of dead tissue on some leaves. You suspect that the levels of ____ must be high in these cells
a. abscisic acid
b. hydrogen peroxide and nitric oxide
c. ethylene
d. jasmonic acid
e. epicatechin
b
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Which one of the following species is endangered by human activity but not yet extinct?
A. the dodo B. the dusky seaside sparrow C. the African white rhinoceros D. the carrier pigeon E. the Bali tiger
A kidney dialysis machine
a. may cleanse the patient's blood outside the body. b. may use the patient's abdominal cavity as the site for solute exchange. c. may use hemodialysis. d. may use peritoneal dialysis. e. may do all of these
What is synthesis of RNA from a DNA template called?
A) Transformation B) Reverse transcription C) Transcription D) Translation E) None of these choices
What cytokine helps induce proliferation and differentiation of B cells and T cells, stimulates release of acute phase proteins, and acts on the hypothalamus to induce fever?
A) interleukin-4 B) interferon-gamma C) interleukin-5 D) interleukin-10 E) interleukin-1