Carlsbad caverns is unusual because the cave was originally carved from
a. iron oxide mixing with calcium carbonate
b. sulfuric acid rising from lower formations
c. acidic rainwater infiltrating through limestone
d. repeated rising and lowering of the water table

Plzzz hurry im being timed ! humans, like other organisms, require energy for growth and repair. when cells create atp for energy, carbon dioxide is produced as a waste product. how does the body respond to this process in order to maintain homeostasis? a. the digestive and respiratory systems interact to move carbon dioxide to the lower intestine, where it is transformed into methane. b. the circulatory and digestive systems interact to move carbon dioxide to the stomach, where it to break down food. c. the nervous and urinary systems interact to move carbon dioxide to the kidneys, where it is absorbed into the bloodstream. d. the circulatory and respiratory systems interact to transport carbon dioxide to the lungs, where it is expelled from the body.

Which phrases describe an extrusive rock? check all that apply. fine texture cooled slowly small crystal size found deep underground different, easily observed minerals

The reactions that occur in the ribosome, where amino acids are combined to form proteins are anabolic or catabolic?