____ refers to the concept that intellectual abilities are not fixed but can be modified under the right conditions at just about any point in adulthood

In addition to neurons, the brain contains an even larger number of another cell type known as

A. mitochondria. B. glia. C. serotonin. D. pseudopodia.

What is the role of the chemical compounds "acetyl" and "methyl" in epigenetics? a. They increase or decrease the probability of a gene mutation. b. They increase or decrease the expression of certain genes. c. They induce the duplication of certain chromosomes

d. They imitate the effects of sex-linked genes.