Question

Identify the odd term based on the pollination type/mechanism.

• A. Crossing between two ramets of single clone.
• B. Geitonogamy
• C. Herkogamy
• D. Autogamy

Hint:

Herkogamy, dichogamy, dioecy, and self-incompatibility are evolutionary strategies used by plants to promote outcrossing (cross-pollination).

Answer 1

The Correct Option is C

Step 1: Understanding the Concept:
Plants have evolved various mechanisms to either promote self-pollination (autogamy) or encourage cross-pollination (allogamy).

Step 2: Detailed Explanation:
- Autogamy (D) is the fertilization of a flower by pollen from the same flower (true self-pollination).
- Geitonogamy (B) is the transfer of pollen from one flower to another flower on the same plant (genetically equivalent to selfing).
- Crossing between two ramets of a single clone (A) also results in self-pollination because ramets are genetically identical copies of the parent clone.
- Herkogamy (C) is a physical, spatial separation of the anthers and stigma within a flower, which is a mechanism designed to prevent self-pollination and promote cross-pollination.
- Therefore, herkogamy is the odd term because it prevents self-pollination, whereas the other three options result in self-pollination.

Step 3: Final Answer:
Herkogamy is the odd term.