Which type of wave cannot move without a medium in which to travel? a. heat waves b. light waves c. sound waves d. transverse waves

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.

Cells are adapted to preform specific functions. which of the following terms refers to this capability?

Which situation is an example of not doing work? lifting a couch throwing a baseball running up stairs carrying a box