A) phylloclade
B) tendril
C) bulbs
D) cladode
Correct Answer: A
Solution :
Phylloclades are green, photosynthetic, often succulent stems of indefinite growth. The leaves are caducous. Phylloclade formation is adaptation to dry habitat, eg, Opuntia, Casuarina. In Opuntia, each segment or phylloclade is a branch that arises in the axil of a caducous leaf and possesses raised areas or areoles representing nodes. Tendril is a stem modification. They may be branched with scale leaves in the region of branching. Bulb is an underground condensed shoot having a reduced discoid convex or slightly conical stem with a cluster of fibrous roots on lower surface, a number of flashy scale, terminal and other buds on the upper surface eg, onion, garlic. Cladodes are green photosynthetic stems of limited growth with leaves reduced to scales or modified into spines eg, Ruscus and Asparagus.
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