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NTA Abhyas NEET2020BotanyMorphology of Flowering PlantsPractice

Thorn is a stem structure because it

Options

  1. Adevelops from trunk
  2. Bdevelops from axillary bud
  3. Cgrows from external surface
  4. Dis pointed

Correct answer

B. develops from axillary bud

Step-by-step solution

Thorn is the axillary buds of some plants. They get arrested in growth and gets modified into a stiff, sharp, pointed structures. They are deep-seated structures and have vascular connections with the stem. They reduce transpiration (water loss by reducing the surface area) and they protect the plant from grazing animals also.

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