What are porous marine invertebrates who pull water through their soft bodies in order to obtain oxygen and nutrition?

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.

Is there any solid scientific evidence that humans have been cloned?

Give examples of selective advantage of organism’s body part/organ