Nora’s grandfather lived to be 87, and her father is still alive at the age of 98. Nora concludes that longevity is inherited and anticipates a very long life. Nora should know that __________
A) there is no reliable data on the heritability of longevity, so the cumulative effects of random events probably contributed to the long lives of her relatives
B) the lifespans of fraternal twins are just as similar as the lifespans of identical twins, indicating that longevity is probably not a heritable trait
C) rather than inheriting longevity directly, people probably inherit risk and protective factors that influence their chances of dying earlier or later
D) the heritability of longevity is high, ranging from .75 to .95 for age at death, indicating that longevity is directly related to genetic factors
Answer: C
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It is suspected that ___________ is a factor in obesity
a. heredity c. having a high fat-to-muscle ratio b. adaptive thermogenesis d. all of these
Equally important as the infant's need for nourishment is the need for ____
a. controlling of bodily wastes through toilet training b. genital touching c. holding, cuddling, and close contact with caregivers d. mastering complex physical skills such as self-feeding, walking, and running
When is full-time grandparent care especially likely?
A) When the grandparents live in the same city as their grandchildren B) When there are more than three grandchildren from one child C) When the grandchild's mother is unmarried D) When the grandchild's father is unmarried
All of the following are functions of the blank spaces between words except:
a) they allow the reader a split second to rest. b) they help indicate the length of upcoming words. c) they provide information about the length of words currently being read. d) they make words physically easier to see.