By the time a human is born, the original zygote has become about ______ cells

Dagwood and Marcia postponed parenthood until Dagwood was 32 and Marcia was 31. They have a happy marriage and both have fulfilling careers. Compared to younger parents, which of the following statements is most likely to be true?

A) Dagwood will be less enthusiastic about being a father. B) Marcia will be less likely to encourage Dagwood to share in child care. C) Dagwood will be more willing to participate in parenting. D) Marcia will be less likely to encourage Dagwood to share housework.

In an experiment to test the effects of a new pain killing drug, the control group was given a placebo, which initially reduced their pain because the placebo

a. raised their endorphin levels. b. lowered their endorphin levels. c. activated the neurilemmas in their receptor sites. d. deactivated the neurilemmas in the receptor sites.