What makes the phosphorus cycle different from the carbon cycle

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.

Acommon kind of mechanical weathering is called

Which of the follow describes a disadvantage secondary sources have compared to primary sources?