AP BIOLOGY

Detailed explanation-1: -Amophila are xerophytic grasses, which show rolling of leaf as a xerophytic adaptation to conserve water.

Detailed explanation-2: -Opuntia is a xerophytic plant where the plant body modifies itself in flat, green succulent structure so as to avoid water loss. By modifying the Stem into a flat leaf-like structure, and reducing leaves into spines, more photosynthesis and less transpiration are achieved.

Detailed explanation-3: -A xerophyte (from Greek xeros ‘dry’ + phuton ‘plant’) is a species of plant that has adaptations to survive in an environment with little liquid water, such as a desert such as the Sahara or places in the Alps or the Arctic. Popular examples of xerophytes are cacti, pineapple and some Gymnosperm plants.

Detailed explanation-4: -So, the correct answer is ‘Opuntia’.