The water potential of a plant cell is –400 kPa. The cell is put in a solution with a water potential of –650 kPa. Describe and explain what will happen to the cell.

The cell will plasmolyse. The protoplasm shrinking away from the cell wall.

The solution is hypertonic to the plant cell.

Water diffuse from less negative water potential (plant cell) to more negative water potential (solution) via osmosis down the water potential gradient.

The water loss of plant cell cause plasmolysis to occur.

Option D

Explanation:

External respiration also referred to as gas exchange describes the process of gas exchange between the bloodstream and the external environment.

It takes into account how air flows in and out of the lungs and how oxygen and carbon-dioxide are transport into the bloodstream by discussion.

It involves three main components, the lung- in particular the alveoli, the external environment and the interesting fluid (bloodstream).