Years ago, nearly 75-80% of all species of life on earth were wiped out in an incredibly short period of time.

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.

What happens during telophase? in advance : ) a. spindle fibers attach to the chrommatids. b. the mitomic spindle forms. c. the chromtaids are pulled apart. d. a new nucleus forms around each copy of dna.

How does light interact with leaves to begin the process of photosynthesis? pigment molecules reflect light energy. pigment molecules absorb light energy. oxygen molecules absorb light energy. oxygen molecules reflect light energy.