Carbon becomes part of the carbon cycle in several ways, both by physical and chemical means. carbon enters a food web via through the process of a) producers; photosynthesis b) land plants; metabolism c) producers; respiration d) trees; transpiration

True or false 5. carrier proteins have the ability to to change shape and physicially move molecules across the cell membrane. 6. in a facilitated diffusion, the concentration of the molecules to be moved across the cell membrane is higher inside the the cell.