Question

Which one of the following is a xerophytic plant, in which the stem is modified into the flat green and succulent structure?

• A. Opuntia
• B. Casuarina
• C. Hydrilla
• D. Acacia

Answer 1

The correct option is A Opuntia

In Opuntia (prickly pear), the stem is modified into a flat, spongy, leaf-like structure (phylloclade) and has water storage tissues inside it. It contains chlorophyll and conducts photosynthesis. The leaves are modified into spines. These modified leaves aggregate to form groups of fine bristles called areoles which are prickly. Hence, Opuntia is also called prickly pear.

Thus, the correct answer is option A.