Question

Select the incorrect statement:

• A. In geitonogamy, pollination occurs in different flowers.
• B. In Vallisneria, pollination takes place with the help of water.
• C. Autogamy involves pollination within the same flower.

Hint:

Geitonogamy is pollination between flowers of the same plant, while autogamy involves self-pollination within the same flower.

Answer 1

The Correct Option is A

Step 1: Understanding geitonogamy.
Geitonogamy refers to a type of pollination in which pollen from one flower is transferred to the stigma of another flower on the same plant. This involves pollination between different flowers but within the same plant. Thus, statement (a) is incorrect because it says that geitonogamy involves different flowers on different plants.
Step 2: Understanding the pollination in Vallisneria.
Vallisneria is an aquatic plant that relies on water for pollination. Its flowers are submerged underwater, and pollination occurs via water currents, making statement (b) correct.
Step 3: Understanding autogamy.
Autogamy is the process of self-pollination, where pollen from a flower pollinates the stigma of the same flower. Thus, statement (c) is correct.
Step 4: Conclusion.
The incorrect statement is (a), as geitonogamy involves pollination between different flowers on the same plant, not different plants.

Answer 2

Step 1: Geitonogamy means pollen moves from one flower to a different flower — but both flowers are on the SAME plant.

Step 2: Statement (a) wrongly implies this happens between unrelated flowers, ignoring that it must be the same plant, making it incorrect.

Step 3: Vallisneria really is pollinated with the help of water, and autogamy really does mean pollination within the same flower — both of those statements are correct.

Step 4: So the incorrect statement is (a) — option (A).

Answer 3

Checking the correct statements first.
Vallisneria is a well-known example of hydrophily, its pollen genuinely travels via water, so statement (b) holds true. Autogamy is by definition pollen moving to the stigma of the very same flower, so statement (c) is also accurate. That leaves statement (a): geitonogamy is loosely described here as pollination "in different flowers," but strictly it must be different flowers of the SAME plant, a detail this statement leaves out. Since (b) and (c) check out and (a) does not hold up fully, (a) is the incorrect statement.