Question

Find the correct match
A. Mustard plants- leaves are opposite
B. Mustard plants- leaves are alternate
C. Guava plants- leaves are alternate
D. Guava plants- leaves are whorled

Answer 1

Hint: The leaves are important structures present in plants because they produce food by the process called photosynthesis. They are arranged in different forms on the stem or branch. These modes of arrangements are called phyllotaxy.

Complete step by step answer:
According to the arrangement of leaves in a stem or branch, phyllotaxy mainly into three types. They are alternate phyllotaxy, opposite phyllotaxy, and whorled phyllotaxy.
In alternate phyllotaxy, there will be a single leaf produced at the node. The characteristic feature of this type of arrangement is that leaves are seen spirally arranged around the stem. Examples of alternate phyllotaxy are China rose, Mustard, and Sunflower. Leaves are said to be in opposite phyllotaxy when two leaves are produced at each node that is seen opposite to each other. The leaves of plants like Guava and Calotropis have opposite phyllotaxy. The third type of arrangement is called whorled phyllotaxy. Here, more than two leaves will be seen at each node. Leaves will be present as a whorl around the stem and the examples are Nerium and Alstonia.
Hence the correct option is B.

Additional information:
The leaves are developed in a plant at nodes. A bud may or may not be seen along with the leaf at nodes. These axillary buds can develop into a branch.

Note: There are several veins on the surface of leaves. Arrangements of these veins on the leaf surface are called venation. They are of two types. They are parallel and reticulate venation. Leaves of dicot plants commonly exhibit reticulate venation while monocot plants usually show parallel venation in their leaves.