A biologist passes blood isolated from a mouse through an affinity column containing beads. The beads have been modified to display both the antigen alone and the antigen attached to a class II MHC molecule. Some cells stick to the column while the rest wash through with a buffer wash. Which class(es) of cells would be represented by the cells that stick to the column

What sentence best supports the statement that hormones are involved in the regulation of homeostasis? a. the hormone erythropoeitin increases the production of red blood cells when oxygen levels are low. b. the hormone oxytocin promotes labor contractions of the uterus during childbirth. c. the hormone melatonin induces sleep and its production is slowed by exposure to light. d. the hormone cortisol suppresses the immune system and is produced when the body is under stress.

Which process of living things produces water that enters the water cycle

Someone with these questions! pls 30 pts