One internode long branches that are cylindrical and photosynthetic are found in

Opuntia

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Asparagus

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Allium cepa

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Solanum

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Solution

The correct option is B Asparagus
In Opuntia, the stem is flat, fleshy and green in colour. Such photosynthetic stems are called phylloclades. They have several nodes and internodes.

Asparagus has cladode, which is one internode in length and is cylindrical and photosynthetic.

Allium cepa (onion) has a modified underground stem with fleshy leaves called a bulb.

In Solanum tuberosum (potato), the stem is underground and stores food material. It is called a tuber. The tuber has a number of depressions called “eyes” and each eye represents a node.

Suggest Corrections

	Phylloclade	Cladode
(i)	Both main stem and branches are modified to function like leaves.	Only the branches are modified to take over the function of leaves.
(ii)	Phylloclade has limited or definite growth.	Cladode has unlimited or indefinite growth.
(iii)	It consist of several nodes and internodes.	It is usually one internode long
(iv)	True leaves are commonly caducous.	True leaves are either reduced to scales or modified to spines.
(v)	Example: Rescus aculeatus, Asparagus etc.	Example: Opuntia, Euphorbia royleana etc.