Question

Which among the following is incorrect about different modes of modifications in stems?

(a) Tendrils are tender and spirally coiled structures that arise from the axillary buds help in climbing of plants

(b) Stem thorns are woody and pointed structures that develop from apical buds and provides protection of plants

(c) Phylloclades are similar to stem thorns in structure but phylloclades are modification of leaves carry photosynthesis and also reduce transpiration

(d) In cladodes, only some part of stem is fleshy and green and they are capable of performing photosynthesis

I got this question by my school teacher while I was bunking the class.

My doubt stems from Flowering Plants Morphology topic in division Morphology of Flowering Plants of Biology – Class 11

Answer 1

Right choice is (b) Stem thorns are woody and pointed structures that develop from apical buds and provides protection of plants

Explanation: Tendrils are tender and spirally coiled structures that arise from the axillary buds help in climbing of plants. Stem thorns are woody and pointed structures that develop from axial buds and provides protection of plants. Phylloclades are similar to stem thorns in structure but phylloclades are modification of leaves carry photosynthesis and also reduce transpiration. In cladodes, only some part of stem is fleshy and green and they are capable of performing photosynthesis.