Two species of Amoeba X and Y were kept in fr | vedclass

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(B) The contractile vacuole is an organelle primarily involved in osmoregulation in fresh water organisms to pump out excess water that enters the cel

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Species $Y$ is marine and $X$ is fresh water.

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(B) The contractile vacuole is an organelle primarily involved in osmoregulation in fresh water organisms to pump out excess water that enters the cell via osmosis.In fresh water,the environment is hypotonic to the cell,so water enters the cell,necessitating a contractile vacuole.Species $X$ developed a contractile vacuole in fresh water,indicating it is adapted to a fresh water environment.Species $Y$ did not develop a contractile vacuole in fresh water,suggesting it is naturally adapted to a marine (hypertonic/isotonic) environment where osmoregulation via a contractile vacuole is not required.When transferred to sea water,both lost their contractile vacuoles because sea water is hypertonic,preventing the influx of water and rendering the contractile vacuole unnecessary.Therefore,$X$ is a fresh water species and $Y$ is a marine species.

Two species of Amoeba $X$ and $Y$ were kept in fresh water and adapted to it. Species $X$ developed a contractile vacuole. When both were transferred to sea water and adapted,both $X$ and $Y$ lost their contractile vacuole. From these observations,we conclude that:

Similar Questions

Animals of class $Ciliata$ (Ciliates):

Which protozoan is unlikely to have a contractile vacuole?

Describe the body organisation of Dinoflagellates.

Choose the photosynthetic protozoan from the following.

Assertion $(A)$: Bacteria and Anabaena algae contain nucleoprotein as their genetic material.
Reason $(R)$: Euglena possesses a well-organized nucleus.

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