Question

When the leaflets are joined together at a common point at the petiole, the leaf is said to be(a) Simple leaf
(b) Pinnately compound leaf(c) Palmately compound leaf
(d) A branch

Answer 1

When the leaflets are joined together at a common point at the petiole, the leaf is said to be" Palmately compound leaf  "

Answer 2

Answer:

(c) Palmately compound leaf

Explanation:

• A leaf is green, dorsoventrally flattened, exogenous lateral outgrowth, arising from a node of the stem or a branch. This is a specialized organ of photosynthesis, transpiration, and gaseous exchange. Based on the incision of the lamina, a leaf may be simple or compound. In a simple leaf, the lamina is not divided completely into distinct leaflets.

Thus option (a) is incorrect.

• Leaf generally bears a bud in its axil called 'axillary bud' which later develops into a branch.

Thus option (d) is incorrect.

• The compound leaves are grouped into two types- 'pinnately compound leaf' and 'palmately compound leaf'.

• Pinnately compound leaves are small, feather-like leaves. The segmentation of the leaf-blade is towards the mid-rib so that the leaflets are borne literally by midrib or rachis.

Thus, option (b) is incorrect.

• In palmately compound leaves, the segmentation of the leaf extends from the apical margin to the petiole so that the leaflets are articulated to the tip of the petiole just like the fingers on a palm. These are fan-like having leaflets that are borne at the tip of the petiole.

Hence option (c) is correct.