First slide

The Tissue System

Question

Choose the statement not true for stomatal apparatus

Easy

A

A stomatal apparatus always has subsidiary cells.
B

Guard cells have chloroplasts.
C

Guard cells show movement due to variation in turgor pressure.
D

Outer walls of guard cells are thin compared to inner walls

Solution

Usually a stomatal apparatus has a pore or stoma, surrounded by two guard cells which are kidney shaped in dicots and dumbbell shaped in grasses like maize. Guard cells are usually surrounded by special epidermal cells called subsidiary cells. In some cases, the subsidiary cells are absent. Movement of stomata is due to variation in turgor pressure. The outer walls of guard cells are thin and inner walls are thick.

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