Question

Cycas leaflets are

• A. Sessile, straight, and spiny
• B. Sessile, straight, and spherical
• C. Sessile, smooth, and twisted
• D. Sessile, straight and linear-lanceolate

Answer 1

The correct option is D

Sessile, straight and linear-lanceolate

The correct option is D.

Explanation for correct option:

1. Cycas is a gymnosperm and it is the only living genus in the family Cycadaceae.
2. They have leaflets in a compound leaf.
3. Cycas leaflet is swollen in the midrib region.
4. They do not have any petiole and are attached directly to the stem so they are sessile.
5. The leaflets are much longer and straight than wide.
6. They are dimorphic, sessile, and lanceolate.

Explanation for incorrect options:

Option A:

1. In cycas, the leaflets are sessile, i.e. they have no stalk, they grow directly from the stem.
2. The leaflets in a compound leaf develop longer and straight called lanceolate.
3. The leaflets are not in spinny form.

Option B:

1. A spherical leaflet has curves with different revolving angles.
2. In the case of cycas leaflets, they directly attach to the stem in a straight way that is in lanceolate form.
3. So, the leaflets in cycas are not spherical, they are in linear-lanceolate form.

Option C:

1. In twisted form, the leaflets are in a curled manner along the length.
2. The cycas leaflets are straight and long and attach directly to the stem.
3. The leaflets are also not smooth at all.

Final answer: Cycas leaflets are sessile, straight, and linear-lanceolate.