Damage theories are based on the idea that
a. individuals damage cells by environmental factors.
b. aging is the result of accumulated errors.
c. aging is driven by genetics.
d. muscle damage from excessive exercise causes premature aging.
ANSWER: b
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As carbon dioxide builds up in the atmosphere, it allows heat from the sun to pass in to the earth, while preventing much of it from radiating back into outer space. This process is referred to as
a. acid rain. b. pea soup. c. the greenhouse effect. d. the atmospheric deficit.
Which of the following is a consequence of Europeans invading the early American settlements?
A) The American Indian tribes prospered through industrialization. B) The European missionaries were responsible for some of the cultural destruction. C) The Europeans helped most tribes survive epidemics through medical support. D) The European invaders prevented the tribes from killing each other in war.
The 2000 U.S. Census was the first that allowed people to check more than one category under race
Indicate whether the statement is true or false
High-income economies are found in nations such as __________.
A. Brazil and Argentina B. Portugal and Israel C. China and Kazakhstan D. Romania and Bulgaria