Question

Lenticels are involved in

• A. Transpiration
• B. Gaseous exchange
• C. Food transport
• D. Photosynthesis

Answer 1

The correct option is B

Gaseous exchange

The correct option is B.

Explanation for the correct option:

1. Gaseous exchange – Plants need oxygen to breathe, thus they exhale carbon dioxide.
2. Plants lack any particular structures for gas exchange.
3. However, unlike humans and animals, they have stomata (holes in leaves) and lenticels (holes in stems) that are actively involved in gas exchange.

Explanation for the incorrect options:

Option A:

1. Transpiration is the biological process through which water is lost from the aerial sections of plants in the form of water vapour.
2. Plants, like other living species, need an excretory system to remove excess water from their bodies.
3. The evaporation of water from the surface of the leaves is what it is all about.

Option C:

1. Food transportation is the process of moving water and essential nutrients to all areas of the plant in order for it to survive.
2. Xylem and phloem, two types of conduits found in plants, form a huge network.
3. This is more like the circulatory system in humans, which distributes blood throughout the body.

Option D:

1. Photosynthesis is the conversion of light energy into chemical energy by plants.
2. Photosynthetic pigments such as chlorophyll-a, chlorophyll-b, carotene, and xanthophyll participate in this process at the cellular level in cell organelles called chloroplasts.

Final answer: Lenticels are involved in gaseous exchange.