If two waves interact in destructive interference, which of the following will be true regarding the new wave formed? A. The new wave will produce a higher-pitched sound than the two original waves.
B. The new wave will produce a lower-pitched sound than the two original waves.
C. The new wave will produce a louder sound than the two original waves.
D. The new wave will produce a quieter sound than the two original waves.

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.

In the presence of oxygen, glycolysis is followed a. the krebs cycle b. lactic acid fermentation c. alcoholic fermentation d. photosynthesis

There are fewer than 100 naturally occurring elements in the universe, but there are millions of different unified substances. explain how this can be true.