During photosynthesis, is used to break water down into oxygen and hydrogen.

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.

Use the distance formula to determine weather each pair of segments have the same length

Why has two different alleles for the same trait?