What is a person who studies weather patterns in a attempt to predict weatger

Will someone me with this.. specialized cells which perform a particular function form: tissues organs or organism

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 of the following is an eon in the time scale? phanerozoic proterozoic archean all of the above