A child whose vocabulary is dominated by names of objects, actions, or persons is said to have a(n) ____ style

When looking at the unusual protrusion sticking out of a newborn's head, Dr. Natas says, "I am sure that the growth is due to some sudden change in the structure of the genes that was not passed on by the parents.". This means that Dr. Natas suspects that the growth is due to

a. mutation. b. some nutritional problem. c. a recessive gene. d. codominance.

Two separate research groups have conducted studies investigating Treatment B for anxiety, and each has found that the treatment group experienced more improvement than a waitlist control group. On the basis of this information alone, we would describe Treatment B as

a. experimental. b. possibly efficacious. c. probably efficacious. d. certainly efficacious.