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3.2&3.3
science flash cards
| Term | Definition |
|---|---|
| selectively permeable | things can pass through the membrane and others cannot |
| diffuision | the action of molocules moving from a high concentration to low concentration |
| osmosis | the diffusion of molocules through selectivley permeable membrane |
| passive transport | the movement of dissolved materials through the membrane without using cellular energy |
| active transport | the movement of materials through the membrane using cellular energy |
| photosynthesis | the action of a cell catching energy through sunlight and using it to make energy |
| autotroph | |
| heterotroph | |
| pigment | colored chemical compounds that obsorb light |
| chloropyll | the main photosynthetic pigment in chloroplasts |
| stomata | small openings on the under side of leaves and plants |