A cell that contains 23 pairs of chromosomes divides by mitosis to form two new cells. How many pairs of chromosomes does each new cell contain?

Which of the following is one of the most common teratogens and can result in stunted growth, facial deformities, and brain damage?

a) alcohol b) caffeine c) cocaine d) mercury

If your sister becomes upset when her best friend does not come to her birthday party, it would be safe to assume that her primary appraisal of this event was ____

a. ?irrelevant b. ?stressful c. ?positive d. ?counterfactual