Which statement best describes the result of the respiratory system interacting with the circulatory system?*
Antigens are produced in the blood
Oxygen is delivered to the cells
Pathogens are identified in the blood
Nutrients are delivered to the cells

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.

Do you think the gene eef1 alpha1 supports cell theory? explain your response.

Which macromolecule catalyzes chemical reactions this be considered enzyme chemical reactions thus he considering enzymes