What part of the ear allows air to enter to help equalize pressure on both sides of the tympanic membrane? Eustachian tube Ossicles Auditory canal Semicircular canals

What is the name for a substance formed in a chemical reaction

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.

How is the carbon cycle related to global warming ?