Which of the following amino acids would most likely not be found in an ? helix?
A. methionine
B. lysine
C. phenylalanine
D. proline
E. glutamine
D
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How many chromosomes are present in human somatic cells?
a. 22 b. 23 c. 44 d. 46 e. 48
In humans, the thirst center is located in the
a. adrenal cortex. b. brain. c. anterior pituitary. d. glomerulus. e. stomach.
If the wound is open, the surface should be cleaned prior to collecting a wound culture. ?
Indicate whether the statement is true or false
Water fleas, Daphnia magna, can switch between asexual and sexual reproduction cy-cles. Which of the following observations support(s) the hypothesis that sex is favored in unpredictable environments?
a. The introduction of predators triggers sexual reproduction. b. Daphnia reproduces asexually every other generation in a variety of habi-tats. c. Daphnia reproduces sexually when its aquatic habitat dries up. d. Asexual D. magna strains outcompete introduced competitors. e. A and C.