Question

what osmoregulatory changes would happen if a marine amoeba is transferred to fresh water

Answer 1

Answer:

The amoeba would probably swell and the cell may lyse. So, if you take a marine amoeba that has adapted special mechanisms to prevent water from escaping the cell, and then transfer it to an environment in which water moves naturally into the cell via osmosis, the cell is going to swell.

As the amoeba prevents the salt from entering, instead the solution will pull water out of the amoeba, concentrating the salts inside. When this happens the amoeba will appear to shrink. If a brine amoeba is put into fresh water and it is not a cyst at the time, its contractile vacuole will burst.

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