Question

Spines in cactus are

• A. modifications of stem
• B. modifications of leaf
• C. modifications of axillary buds
• D. modifications of stipules

Answer 1

The correct option is B modifications of leaf

Cactus is a xerophyte living in arid conditions. The leaves in this plant are modified into spines to reduce the rate of transpiration.

The stem can be modified into rhizome, corm, tubers, bulb, runner, stolon, offset, sucker, tendril, thorn, phylloclade, cladode and bulbil.

Axillary buds can be modified into tendril. For example, pea plants.

Stipules are two lateral leaf-like structures present on either side of the leaf base. They can be modified into tendrils. For example, Smilax.