In explaining why people age and eventually die, Dr. Filipovsky talks about free radicals and how their buildup produces tissue damage. Dr. Filipovsky is promoting a ____ theory of aging.
a. wear-and-tear
b. metabolic
c. cellular
d. programmed cell death
Question 2
Marcel's parents often ask about his day at school, set reasonable rules, and provide guidance when he is having difficulty in school. How likely is Marcel to smoke cigarettes?
a. very likely, as he needs to set up his own value system
b. somewhat likely, as he is curious about what smoking feels like
c. less likely than average, smoking is not naturally appealing
d. not at all likely, as his parents have strict rules against smoking
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