Question

which structure in the leaf controls the opening and closing of the stoma?
a. cuticle
b. epidermis
c. guard cell
d. spongy mesophyll

1. what is the question asking?

what is the correct answer?
why are the other answers incorrect?

Explanation:

What is the question asking?

The question is asking to identify the leaf structure that controls the opening and closing of the stoma from the given options.

What is the correct answer?

C. guard cell

Why are the other answers incorrect?

• Option A (cuticle): The cuticle is a waxy layer on the leaf surface that reduces water loss, not related to stoma opening/closing.
• Option B (epidermis): The epidermis is a protective tissue layer; it contains stomata but doesn’t control their opening/closing.
• Option D (spongy mesophyll): Spongy mesophyll is involved in gas exchange and photosynthesis, not in regulating stoma opening/closing.

Answer:

What is the question asking?

The question is asking to identify the leaf structure that controls the opening and closing of the stoma from the given options.

What is the correct answer?

C. guard cell

Why are the other answers incorrect?

• Option A (cuticle): The cuticle is a waxy layer on the leaf surface that reduces water loss, not related to stoma opening/closing.
• Option B (epidermis): The epidermis is a protective tissue layer; it contains stomata but doesn’t control their opening/closing.
• Option D (spongy mesophyll): Spongy mesophyll is involved in gas exchange and photosynthesis, not in regulating stoma opening/closing.