题目内容
Some organisms such a paramecium, a protist, have osmotic problems due to their environment. They have an adaptation for osmoregulation to control the balance of water to maintain homeostasis. What specialized organelle do they have to help maintain their internal environment?
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If the concentration of a solution outside a cell is less concentrated than inside the cell so that the cell gains water to its environment, the outside solution is said to be ____ to the cell contents.
What are the main macromolecules found in the cell menbrane?
The plasma membrane is the protective barrier that separates living organisms from their environment. What does the term selectively permeable mean?
Which process does the cell use to change the composition of the cell membrane?
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