DENDROLOGY

TREE IDENTIFICATION

PARTS OF A TREE

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What opens and close the stomata?
A
guard cells
B
xylem
C
phloem
D
cuticle
Explanation: 

Detailed explanation-1: -Upon the incoming of water inside the guard cells, they swell up to become like a curved banana surface, due to which the stomatal pore opens up. When the guard cells lose water, they become flaccid and straight and thus, close the stomatal aperture.

Detailed explanation-2: -Plant stomata open and close in response to a variety of environmental factors including light, water content, temperature, and carbon dioxide levels inside the plant. Light is one of the most important factors that promote stomata opening. Higher quantities and intensity of light promote opening.

Detailed explanation-3: -Stomata are pores on the leaf surface, which are formed by a pair of curved, tubular guard cells; an increase in turgor pressure deforms the guard cells, resulting in the opening of the stomata.

There is 1 question to complete.