The study of moral development is most associated with the work of:

Environmental agents such as a drug, chemical, virus, or other factor that produce a birth defect are known as ______________________.

A. sickle-cell anemia B. down syndrome C. phenylketonuria D. teratogens

Spermatozoa contain 46 chromosomes and spermatids contain 23

Indicate whether the statement is true or false