Chlorine has an atomic number of 17 and an atomic mass of 35. Therefore, chlorine has ________ electrons and ________ neutrons
A) 17; 18
B) 18; 17
C) 17; 35
D) 35; 17
E) 18; 18
A
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Temperature has a dramatic effect upon cell membranes. This influence can readily make a cell membrane more solid or more fluid in response to the temperature. This is an example of
A) liquidation. B) membrane flexibility. C) phase transition. D) membrane asymmetry. E) scanning calorimetry.
In a cell with a diploid number of 12, how many chromatids are present at prophase of mitosis?
A) 6 B) 12 C) 24 D) 48 E) none of the above
"Adult" stem cells are more accurately called tissue-specific or somatic stem cells because
A) they are also present in the tissues of embryos, fetuses, and children. B) some adults do not have them. C) whether they are present or not in an adult depends upon the individual's level of maturity. D) an adult body also contains embryonic stem cells.
While touring the ancient Egypt exhibit at the local history museum, you learn that ancient Egyptians would slash figs in order to stimulate ripening. Based on your knowledge of plant hormones you hypothesize that wounding the figs must release:
A. ethylene. B. gibberellin. C. abscisic acid. D. cytokinin. E. indoleacetic acid.