Question

in some plants stem are modified to perform photo synthesis explain
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Answer 1

Answer:

Phylloclades and cladodes are flattened, photosynthetic shoots, which are usually considered to be modified branches. The two terms are used either differently or interchangeably by different authors. Phyllocladus, a genus of conifer, is named after these structures.eg : cactus

Answer 2

Answer:

Because plants produce underground stems for penetration and food storage and produce aerial shoots annually.

Modification of stems for photosynthesis:Some plants of arid regions modify their stems into flattened (Opuntia)or fleshy cylindrical (Euphorbia) structured