Question

The pattern of arrangement of leaves on a stem is called .

• A. venation
• B. whorls
• C. phyllotaxy
• D. placentation

Answer 1

The correct option is C phyllotaxy

Phyllotaxy is the pattern of arrangement of leaves on the stem. It is of three types.

1. Alternate: A single leaf arise at each node. E.g. China rose, sunflower, etc.
2. Opposite: A pair of leaves arise at each node, opposite to each other. E.g. Calotropis, guava, etc.
3. Whorled: More than two leaves arise at a node and forms a whorl. E.g. Alstonia, aloevera, etc.