Plants have special groups of self-renewing cells called
A. root cells.
B. meristems.
C. cast cells.
D. chloroplasts.
Answer: B
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The function of the rugae of the stomach is to:
a. secrete amylase. b. crush the food. c. increase the holding capacity of the stomach. d. mix the food with gastric juices. e. increase the surface area for secretion
IgD, IgM, IgG, IgA, and IgE are types of white blood cells
Indicate whether the statement is true or false
Amoxicillin is very effective for treating infections with Gram-positive bacteria but rarely causes side effects in humans. This is an example of
A) selective toxicity. B) narrow spectrum of action. C) a broad-spectrum antimicrobial. D) antibiotic resistance. E) altruism.
You are asked to participate in a clinical trial for a new drug that can activate telomerase. Which of the following is a likely risk of such a drug?
A. decreased capacity for tissue repair B. decreased telomere length C. increased vulnerability to cancer D. premature aging