Plsss help Which statement describes the movement of carbon dioxide in the carbon cycle?

A.
The gas enters the hydrosphere as sugar dissolves in water.

B.
The gas enters the cryosphere as ice sheets melt.

C.
The gas leaves the biosphere as animals breathe in air.

D.
The gas leaves the atmosphere as plants use it to make sugar.

Which of the following statements about archaea and bacteria is true? a. neither is single-celled. b. they both have nuclear membranes. c. neither reproduces by binary fission. d. they both lack a nuclear membrane.

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.

Explain why ecosystem diversity results in species diversity in a healthy biosphere