The Leaf and Its Parts

Q. Which of the following is not the part of the leaf?

1. Petiole
2. Lamina
3. Internode
4. Leaf base

Q.

Which of the following is wrong?

1. Bract — occurs singly at the base of stalk of a flower

2. Stipule — occurs singly at the base of stalk of a leaf

3. Bracteole — occurs in pairs on the stalk of a flower

4. Thalamus — occurs at the tip of floral stalk

Q.

The pulvinus helps the touch-me-not to

1. make the leaves more stiff

2. rapidly close the leaves on touch

3. supports the leaves

4. provide water to the leave during emergency

Q.

In some plants, the leaf base can swell up and form a __ that can lose water rapidly.

Q. Where do leaves arise on the stem?

1. Apex
2. Nodes
3. Anywhere on the stem
4. Internodes

Q.

Study the following statements and select the option with correct statements.
I. Pulvinus leaf base is present in some leguminous plants.
II. In Eichhornia, the petioles expand, becomes green and synthesize food.
III. Opposite phyllotaxy is seen in guava.

1. I and III

2. I and II

3. I, II and III

4. II and III

Q. Match the following parts of leaves with their functions.

1. Central vein
2. Connects to stem
3. Absorbs sunlight
4. Transports water

Q. In monocots, __________ leaf base is present.

1. pulvinus
2. sheathing
3. decurrent
4. none of these

Q. Which of the following statements is incorrect about simple leaves?

1. The lamina is undivided
2. When the lamina is divided, the incisions of the lamina do not touch the midrib
3. The lamina does not bear leaflets
4. Bud is absent in the axil of the petiole of simple leaf

Q. The stalk of the leaf is called

1. pedicel
2. peduncle
3. stipule
4. petiole