During early adulthood, significant hormonal changes continue. What is a result of this in some males? a. beginning of production of testosterone by the testes
b. beginning of sperm production
c. beards grow thicker and their voices become slightly deeper and richer
d. increased body hair begins

There are few cells in the body that do not undergo mitosis: most somatic cells divide regularly, some more than others. take for example the cells that line the digestive tract. these cells must be frequently replaced because they are constantly eroded by the movement of food through the tract. what mechanism(s) is/are in place to ensure that these cells are exact copies of the mother cell