Question

Choose the correct option from the following: Which part of the plant takes in carbon dioxide from the air for photosynthesis?

• A. Root hair
• B. Stomata
• C. Leaf veins
• D. Sepals

Answer 1

The correct option is B

Stomata

The correct option is B.

Explanation of the correct option:

The part of the plant that takes in carbon dioxide from the air for photosynthesis is Stomata. Below are some of the factors that are responsible: -

1. Carbon dioxide is taken in from the atmosphere through stomata, which are pores in the leaves, while water is taken in through the roots.
2. There are an excessive number of tiny pores on the surface of plant leaves.
3. Green plants absorb greenhouse gases from the atmosphere for photosynthesis.
4. Through the stomata that are found on the surface of the leaves, CO₂ enters the plant.

Explanation of the incorrect option:

Option A:

1. Root hair, also known as absorbent hairs, are specialized cells at the tip of plant roots called epidermal cells.
2. They are rarely branched and are just lateral expansions of a single cell. They are located in the root's maturation region.

Option C:

1. The xylem and phloem cells that make up veins are encased in bundle sheath cells and parenchyma, as well as occasionally sclerenchyma.
2. Water is transported from the petiole through the lamina mesophyll by the vein xylem, while sugars are transported from the leaf to the rest of the plant via the phloem.

Option D:

Sepals, which are often green, serve as both support for the petals during bloom and protection for the flower while it is still in the bud stage.

Final answer: The part of the plant that takes in carbon dioxide from the air for photosynthesis is the stomata.