How can an amoeba survive in hypotonic environment?

Answer 1

Amoebae survive in hypotonic environments because they have contractile vacuoles to pump excess water out of the cell.

To regulate osmotic pressure, most freshwater amoebae have a contractile vacuole (CV) that expels excess water from the cell.

This organelle is necessary because the surrounding water is hypotonic with respect to the contents of the cell.

Water is transferred across the amoeba's cell membrane by osmosis.

Without a CV, the cell would fill with excess water and eventually burst.

Excess water enters the CV, which swells and moves to the edge of the cell.

The CV bursts and expels its water, and the cycle repeats.

I couldn't find a good video on amoebae, but here is a good video showing the operation of CVs in paramecia.

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Answer 2

Penelope Adams

An amoeba can survive in a hypotonic environment by regulating its internal osmotic pressure through the process of osmoregulation. This involves controlling the movement of water across its cell membrane using contractile vacuoles to expel excess water and maintain internal balance.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.