Question

Why does plant cell poses large sized vacuole?

Answer 1

Vacuoles:

1. Vacuoles are membrane-bound organelles present in both plant and animal cell.
   
2. In plants, a single, large and permanent vacuole is present.
3. It typically occupies 30% to 80% of plant cell volume.
   
4. It is surrounded by a membrane called tonoplast and is filled with cell sap.
   
5. In animal cells, vacuoles, if present are small and many.​

Importance of vacuoles:

1. To store food and water: They are equipped with a large vacuole in comparison to animal cells since the plants are immobile to gin nutrition from surrounding and they need to store as much food they can(an evolutionary feature to support survival).
2. Turgor pressure: To hold turgor pressure across the cell wall the vacuoles are present to maintain a stability in the cell.
   
3. Those vacuoles gain and lose water depending on how much water is available to the plant.
   
4. A drooping plant has lost much of its water and the vacuoles are shrinking.
   
5. It still maintains its basic structure because of the cell walls.
   
6. When the plant finds a new source of water, the vacuoles are refilled and the plant regains its structure.