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Blume ch3#36-43
Question | Answer |
---|---|
why did we compare a cells permeable membrane to a screen on a window? | because it keeps bigger things out and lets some small things in. |
describe diffusion: | when something moves from one place to another. |
what is equilibrium? | when any surface inside and outside is equal. |
what would cause a human cell to use fermentation instead of cellular respiration? | lack of oxygen. |
What two things do producers give off as wastes that consumers need? | oxygen & sugar |
what two things do consumers give off as wastes that producers need? | carbon dioxide & water |
give an example of a consumer | animals |
give an example of a producer | plants |