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Unit 3
Question | Answer |
---|---|
When one substance is fully dissolved in a another, the resulting mixture is called a ___ | solution |
The substance being dissolved in another is a __ | solute |
A liquid that dissolves another substance is a __ | solvent |
Spreading of molecules (due to their movement) from areas of greater concentration (HIGH) to areas of lesser concentration (LOW) is __ | diffusion |
the diffusion of water across a membrane is __ | osmosis |
What happens to a cell in freshwater? | it swells |
What (generally) happens to a cell in saltwater? | it shrinks |
What (specifically) happens to a PLANT cell in saltwater? | the water leaves the cells, emptying the vacuole, causing the cell membrane pulls away from the cell wall and to shrink in, scrunching up all of the other organelles. |
Which protist was green, tiny, and had a whip-like tail? | Euglena |
Which protist was oval-shaped, and had cilia all over (hairs) to move ? | Paramecium |
Which protist is "blob-like" and flows its cytoplasm to make pseudopodia (false feet)? | Amoeba |
What structure in a protist squirts out water from the cell? | the contractile vacuole |
Why does the contractile vacuole squirt out water? | Protists live in freshwater, and so water enters them by osmosis. Squirting out the extra water keeps them from swelling and bursting. |