What theory states that species stay the same for a long time and then change quickly because of environmental changes?

a) natural selection

b) allopatric speciation

c) coordinated stasis

d) punctuated equilibrium

Hummingbirds drink nectar from flowers, while robins eat plant seeds. what does this reduce?

Building glycogen from glucose molecules is an example of what

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.