A plant is living along the shore of a deep, large, and cold body of fresh water. The top of the body of water is full of life and the bottom has less life, as it receives little sunlight.
In which ecosystem does this plant most likely live?

a river
oa lake
the open ocean
a coral reef

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.