The controls the materials that enter and leave the cell.

Dean has been collecting data on the health risk related to eating too much fast food. which of these would not be a valid conclusion that dean could develop? a) the food in fast food restaurants tastes really good. b) people who eat fast food three times a week are more likely to be obese. c) the chemicals found in the "special sauce" can be linked to acid indigestion. d) eating at fast food restaurants twice a week may lead to increased chance of heart attack.

What came first the elephent or the crocodile

Tlymphocytes mature in the? a. thyroid gland. b. bone marrow. c. spleen. d. thymus.