Question

Phyllotaxy is

• A. Mode of leaf arrangement on stem
• B. Types of roots
• C. Arrangement of sepals and petals in a flower
• D. Type of ovary

Answer 1

Answer: (A)

Mode of leaf arrangement on stem

Phyllotaxis is the phenomenon of mode of arrangement of leaves on the stem. It is of four types, namely alternate, spiral, opposite and whorled. In alternate phyllotaxy, a single leaf arises from the node. This type of phyllotaxy is seen in sunflower, mustard. In opposite phyllotaxy, two leaves arise from the node in opposite directions. It is seen in guava. In spiral phyllotaxy, the leaves are arranged in spiral fashion along the axis. In whorled phyllotaxy more than two leaves arise from the node.

Thus, the correct answer is 'Mode of leaf arrangement on stem.'