The spongy tissue that grows out of the trophoblast layer and into the uterine lining is called the

Because talking is a dominant means of contact in the United States, we tend to avoid conversations with ___________

a. too many words b. periods of silence c. many interruptions d. other people

Anne mentions that her cousin has a congenital anomaly. You would know that this is sometimes also referred to as:

a. a sex-linked trait b. a birth defect c. an autosomal disorder d. a heterozygous trait