Which molecule is classified as organic?
a) water
b)oxygen
c)protein
d)sodium chloride

Along with the kidneys, the ureters, bladder, and urethra make up the urinary system. match each function or description to the appropriate structure.

Coral reefs support more species per unit area than any other marine environment on earth. what is one way coral reefs are important to the health of the biosphere

What is true of all organisms in the kingdoms protista, plantae, fungi, and animalia? a. they are multi-celled. b. they are photosynthetic. c. they have cells that contain membrane-bound organelles. d. they contain cells that lack membrane-bound organelles.