Question

Choose the correct option from the following:

Plants take carbon dioxide from the atmosphere mainly through their:

• A. Roots
• B. Stem
• C. Flowers
• D. Leaves

Answer 1

The correct option is D

Leaves

The correct option is D.

Explanation of the correct option:

1. Carbon dioxide is mostly taken up by plants through their leaves from the atmosphere.
2. The tiny openings known as stomata can be seen on the surface of leaves.
3. A leaf's primary job is to use photosynthesis to make food for the plant.
4. Light energy is absorbed by chlorophyll, the compound that gives plants their distinctive green colour.
5. The leaf epidermis, which is continuous with the stem epidermis, protects the internal leaf structure.

Explanation of the incorrect option:

Option A:

1. The roots' main job is to draw moisture and dissolved minerals from the soil.
2. This is essential because it facilitates photosynthesis.
3. Starch is the form of food that plants prepare and store in their leaves, shoots, and roots.

Option B:

The stem's main jobs are to support the leaves, carry nutrients and water to the leaves so that photosynthesis can turn them into useful substances, and then carry those substances from the leaves to other sections of the plant, including the roots.

Option C:

Since flowers are the plant's reproductive organs, reproduction is the flower's main purpose.

Final Answer: Plants take carbon dioxide from the atmosphere mainly through their leaves.