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"The cell membrane is a thin layer that surrounds and holds a cell together. This movement of water creates the problem. To understand how, consider a single-celled protist that lives in freshwater. The water inside the protist is mixed with many different chemicals. The water outside the protist contains few chemicals but few water molecules."
- 9th Grade Biology Book
Wiki User
∙ 13y ago
Wiki User
∙ 10y agoThey are hypertonic to the water they are in. They need to use their contractile vacuoles to rid their body's of excess water.
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What are the problems that face a communication student?
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The name of her.
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what problems to the amish population face
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