Rod-shaped portions of DNA called chromosomes are organized into __________ pairs

Dr. Ramirez examined 100 brother–sister pairs for 10 minutes each, noting on a checklist the behaviors that occurred during 20 thirty-second intervals. This is an example of

A) event sampling. B) time sampling. C) a naturalistic observation. D) a genetic experiment.

When Jordan, who is a 25-year-old and married father of one infant daughter, is laid off from his job, it impacts him with a devastating amount of worry and fear. When Jackson, who is a 72-year-old married man with five grandchildren, is laid off from his job, he seems to take it in stride and decides that this is a good time to retire. Which of the following forces BEST explains the different

reactions of Jordan and Jackson? a. biological forces b. psychological forces c. sociocultural forces d. life-cycle forces