Which statements describe the importance of the nitrogen cycle to living things? Select two options. A It provides a source of water.
B It helps cells make proteins.
C It provides a form of usable nitrogen.
D It removes carbon dioxide from the atmosphere.
E It destroys harmful bacteria.
F It helps cells make glucose.

Galaxy whose shape seems different follow no set pattern are classified as

Monitor and apply fix up strategies

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.