Question

In a mature plant cell, 90% or more of the volume is often occupied by one of two very large central ____.

Answer 1

The large central vacuole occupies up to 90% of a mature plant cell's volume, playing crucial roles such as storing water, maintaining turgor pressure, and containing pigments for flower coloring.

Step-by-step explanation:

In a mature plant cell, 90% or more of the volume is often occupied by one of two very large central vacuoles. The central vacuole is a prominent organelle in plant cells that serve multiple functions, including storage of water and nutrients, waste management, and maintaining turgor pressure to keep the plant upright. The central vacuole is surrounded by a membrane known as the tonoplast which regulates the movement of water and also stores pigments that color flowers. In conditions of water scarcity, water can move out of the central vacuole, causing the plant to wilt due to a lack of support from the central vacuole to the cell wall.