Question

Introrse and extrorse anthers are found in the following plants respectively:

• A. Solanum and Lily
• B. Lily and Solanum
• C. Datura and Petunia
• D. China rose and Pisum

Hint:

Anther dehiscence is used in plant taxonomy: - \textbf{Introrse} = dehisces towards center (gynoecium). - \textbf{Extrorse} = dehisces away from center (perianth).

Answer 1

The Correct Option is A

Step 1: Understand what introrse and extrorse anthers mean.
Introrse anthers open towards the center of the flower (towards the gynoecium).
Extrorse anthers open away from the center of the flower (towards the petals).

Step 2: Classify the examples.
Solanum (e.g., tomato and brinjal) has introrse anthers.
Its anthers are fused, forming a cone around the style, and dehisce inwards — this is a classic case of introrse dehiscence.
Lily belongs to the monocots and shows extrorse anthers, which open outwards.

Step 3: Eliminate incorrect options.
Option (2): Reversed the terms.
Option (3): Datura and Petunia both have introrse anthers.
Option (4): China rose and Pisum both have introrse anthers.
Thus, only option (1) is correct.