The yolk sac __________
A) forms during the third trimester of pregnancy
B) is the outer ring of cells that surrounds the blastocyst
C) produces blood cells until the organs are mature enough to take over this function
D) contains one large vein that delivers blood loaded with nutrients and two arteries that remove waste
Answer: C
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Many people categorize tomatoes as a vegetable, even though they technically meet the scientific definition for a fruit. A likely reason for this is that:
A) they are using classical categorization. B) tomatoes only belong in a category of their own. C) tomatoes are closer to most people's prototype for a vegetable than their prototype for a fruit. D) the tomato is a common prototype for fruit.
______ assumed that a successful resolution of each stage challenge resulted in the two poles finding a healthy balance.
A. Erikson B. Maslow C. Baltes D. Carstenson
According to your text, which of the following research findings about communication has been recently asserted?
a. Men and women really do seem to speak "different languages." b. The idea of gender differences in language is largely overrated. c. Men and women in couples with large age differences consistently have trouble communicating verbally. d. None of the above
Which of the following is NOT true concerning depression?
A) Depression is more common in females than in males. B) Most depressive episodes appear not to be preceded by any particular factor or event. C) Most depressive episodes last less than 3 months. D) Most people recover from depression without professional therapy.