You have a chart that illustrates a series of species with their common ancestor. this chart is a
a. gene pool.
b. fossil record.
c. cladogram.
d. five-kingdom system.

Which element provides strength to the exoskeleton of clams and oysters

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.

About how much of the cell mass is watet