According to the article Who's Old First about physical declines in old age, the question "When do we start to get old?" usually refers to:
(a) the numbers of children and grandchildren we have
(b) the age at which we retire from work
(c) the number of times we have changed jobs and moved
(d) bodily systems which are not as good as they used to be
D
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What is meant by selective attrition? a. Some participants fail to answer all the questions on a survey
b. Some participants respond to demand characteristics, and others don't. c. Those who volunteer for a study may be unrepresentative of the population. d. Some participants quit before the study finishes.
In the absence of biochemical instructions, the embryo's indifferent gonad will develop sexually
a. in a masculine style. b. in a neutral style that is neither male nor female. c. in masculine as well as feminine styles. d. in a feminine style.