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Botany Question 8 – AP-EAMCET 2025

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Match the following List - I (Pollination)List - II (Mechanism)A. XenogamyI. Exposed anthers and stigmasB. OphiophilyII. Genetically different type of pollen grainsC. ChasmogamousIII. Flowers do not openD. CleistogamousIV. Pollination by snakes

Recall the definitions of different types of pollination and flower characteristics related to their opening mechanism.

Step 1: Define each term in List-I✦ Active

Let's define each term from List-I to find its corresponding mechanism in List-II:

A) Xenogamy: This is a type of cross-pollination where pollen grains are transferred from the anther of one flower to the stigma of a flower on a genetically different plant. This ensures genetic variation.

B) Ophiophily: This term refers to pollination carried out by snakes. It is a specific type of zoophily (pollination by animals).

C) Chasmogamous flowers: These are flowers that open at maturity, exposing their anthers and stigmas to facilitate pollination, which can be either self-pollination or cross-pollination.

D) Cleistogamous flowers: These are flowers that do not open at all. They remain closed, ensuring self-pollination as the anthers and stigmas are in close proximity within the closed flower.

💡 Teacher's Secret Hint

Distinguish between chasmogamous and cleistogamous flowers carefully. Chasmogamous flowers are 'open' while cleistogamous flowers are 'closed'.

Step 2: Match List-I terms with List-II mechanisms○ Expand

Based on the definitions:

A) Xenogamy matches with II) Genetically different type of pollen grains. (A-II)

B) Ophiophily matches with IV) Pollination by snakes. (B-IV)

C) Chasmogamous matches with I) Exposed anthers and stigmas. (C-I)

D) Cleistogamous matches with III) Flowers do not open. (D-III)

💡 Teacher's Secret Hint

Pay close attention to the specific wording in List-II to ensure the best fit for each term.

Step 3: Formulate the correct matching combination○ Expand

Combining the matches from Step 2, we get the following sequence: A-II, B-IV, C-I, D-III.

Step 4: Compare with the given options○ Expand

Let's check which option matches our derived combination:

Option 1: A-IV, B-II, C-III, D-I (Incorrect)

Option 2: A-II, B-III, C-I, D-IV (Incorrect)

Option 3: A-II, B-IV, C-I, D-III (Correct)

Option 4: A-II, B-I, C-IV, D-III (Incorrect)

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