Explain in detail the external structure of the leaf.

The following question contains an assertion followed by a reason. Read it carefully and answer the question on the basis of following options.

Assertion: The leaves of plants take in water constantly in the form of water vapour(which goes into air).

Reason: Plants undergo the process of transpiration.

The following question contains an assertion followed by a reason. Read it carefully and answer the question on the basis of following options.

Assertion: Tamarid plant has reticulate venation.

Reason: In reticulate venation, the veins in a leaf occur in an irregular way forming a net-like design.

The following question contains an assertion followed by a reason. Read it carefully and answer the question on the basis of the following options.

Assertion: In Hibiscus, a single leaf arises at the node of a branch. The consecutive leaves are arranged in an irregular manner.

Reason; It is due to the phyllotaxy feature of plants.