The is the time period during which irreversible damage to the fetus may occur from specific events such as malnutrition or exposure to toxins.

During the process of meiosis, special cells called gametes are formed. gametes only have half the number of chromosomes that the other cells in the body have. what form of reproduction do organisms that produce gametes use?

Factors that can increase mutation rates a. high temps b. low temps c. food additives d. uv rays

Most animal cell membranes have proteins that pump. ions out of the cell and potassium ions into this