Question

Identify the part that controls the closing and opening of the stomatal pore in leaves of plants.

Select the correct option.

Options

• Stomata

• Epidermal cells

• Guard cells

• Chloroplasts

Answer 1

Guard cells

Explanation:

Guard cells regulate the opening and closing of stomatal pores by controlling their turgor pressure. Each stomatal pore is surrounded by two kidney-shaped cells called guard cells. Guard cells control the opening and closing of stomata by changing their turgor pressure. Guard cells swell, and the pore opens when they absorb water. When they lose water, they shrink, and the pore closes.