HORTICULTURE

HORTICULTURE SCIENCE

ULTRA STRUCTURE OF PLANT CELLS AND ORGANS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
The important gases, carbon dioxide and oxygen, enter and leave the leaf through the
A
upper epidermis
B
phloem
C
stomata
D
guard cells
Explanation: 

Detailed explanation-1: -Carbon dioxide and oxygen cannot pass through the cuticle, but move in and out of leaves through openings called stomata (stoma = “hole"). Guard cells control the opening and closing of stomata. When stomata are open to allow gases to cross the leaf surface, the plant loses water vapor to the atmosphere.

Detailed explanation-2: -Most carbon dioxide enters the leaf through the stomata which are tiny whole guarded by cells. Most stomata are found on the leaves of plants. All of these parts work together to help the plant go through photosynthesis. Without this process, plants would not be able to produce and retain their energy.

Detailed explanation-3: -Carbon dioxide enters, while water and oxygen exit, through a leaf’s stomata. Stomata control a tradeoff for the plant: they allow carbon dioxide in, but they also let precious water escape.

There is 1 question to complete.