Chemistry

Question

The graph below shows the solute concentration inside a paramecium over time. What is happening at the time indicated by the pointer?



Water is moving rapidly into the paramecium by osmosis.
Water is moving rapidly out of the paramecium as the contractile vacuole contracts.
The paramecium is having a meal.
Solutes from the surrounding water are diffusing through the cell membrane, causing the solute concentration inside the paramecium to rise.

1 Answer

  • The pointer indicated the point at which water is moving rapidly out of the paramecium as the contractile vacuole contracts.

    • The pointer specifically indicates where the water solute concentration dropped. In order for the solute concentration of the water to drop, more water would have to be added.

    • This means that water from the paramecium moves into the surrounding water as the contractile vacuole contracts. Consequently, the solute concentration of the surrounding solution decreases.

    • When water moves from the solution into the paramecium, the solute concentration increases and this forms a continuous cycle in the graph.

    More on water movement by osmosis can be found here: https://brainly.com/question/21395644?referrer=searchResults

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