1) The processes of diffusion is used to -differentiate the jobs among cell organelles
-break down molecules to release energy
-produce proteins for the cell to help move molecules against a concentration gradient
-move molecules into or out of cells across the membrane

Which statement describes characteristics of planarians? a they live in oceans, are parasites, and reproduce only sexually. b they live in fresh water, are parasites, and reproduce only asexually. c they live in oceans, are free living, and reproduce sexually and asexually. d they live in fresh water, are free living, and reproduce sexually and asexually.

What organs comprise the respiratory system of a bird

Facilitated diffusion move large molecules and/or polar molecules across the cell membrane. what does facilitated diffusion use to do this?