Frogs, lizards, and birds all have a similar
arrangement of bones in their limbs. which of the
following does this similarity most
likely indicate about these animals?
a. they move in the same way.
b. they have a common ancestry.
c. they evolved at the same time.
d. they are comparable in size as adults.

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.