What small 3-carbon molecule do the fatty acids attach to, making a lipid?

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.

What kinds of molecules can pass through the cell membrane without any problem?

What is the difference between topsoil and clay?