Question

The broad base of the leaf is known as

• A. Midrib
• B. Stoma
• C. Chlorophyll
• D. Lamina

Answer 1

The correct option is D

Lamina

The correct option is D:

Explanation of the correct option:

1. The broad base present in the leaves are known as lamina.
2. Lamina is an expanded, flattened portion of the leaf.
3. It is attached to the petiole part of the leaf and the petiole is attached to the stem.
4. It is the region which have chloroplast and is responsible for the process of photosynthesis.

Explanation of the incorrect options:

Option A:

1. Midrib is known as the central vein of the leaf.
2. Midribs can extend from the underside of the leaves due to pinnate venation.
3. The centre vein, also known as the rib, of a leaf, extends from the stem to the tip.

Option B:

1. Stomata are the minute pores found on the epidermis of plants.
2. In some species, stomata can be found on stems and other sections of the plant.
3. Gaseous exchange and photosynthesis are both dependent on stomata.

Option (c):

Chlorophyll is a pigment that gives plants their green colour and helps them manufacture their own nourishment through photosynthesis.

Final answer: The broad base of the leaf is known as lamina.