Question

Match List-I with List-II

List-I (Specific traits) & List-II (Crops where it is commonly found)
(A) Monoecy & (III) Maize
(B) Self-incompatibility & (I) Brassica
(C) Protogyny & (II) Pearl millet
(D) Dioecy & (IV) Papaya

• (A) - (III), (B) - (I), (C) - (IV), (D) - (II)
• (A) - (III), (B) - (I), (C) - (II), (D) - (IV)
• (A) - (III), (B) - (IV), (C) - (II), (D) - (I)
• (A) - (III), (B) - (IV), (C) - (I), (D) - (II)

Hint:

To remember this:
- Monoecy: Maize (Tassel and Ear on the same plant).
- Dioecy: Papaya (distinct male and female trees).
- Protogyny: Pearl millet (stigmas emerge and mature before pollen release).

Answer 1

The Correct Option is B

Step 1: Understanding the Concept:
Cross-pollinated plant species have evolved various morphological and physiological mechanisms to prevent self-fertilization and promote outcrossing.
These include monoecy, dioecy, dichogamy (protandry and protogyny), and self-incompatibility.

Step 2: Detailed Explanation:
Let us match each reproductive trait in List-I with its classic representative crop in List-II:
- (A) Monoecy $\rightarrow$ (III) Maize:
Monoecy is a condition where separate male and female flowers are present on the same individual plant.
In maize (*Zea mays*), the male inflorescence (tassel) is located apically, while the female inflorescence (ear/silk) develops in the leaf axils.
- (B) Self-incompatibility $\rightarrow$ (I) Brassica:
Self-incompatibility is a physiological barrier that prevents fertilization by a plant's own functional pollen.
*Brassica* species are classic examples of plants exhibiting sporophytic self-incompatibility, which is genetically controlled by the S-locus.
- (C) Protogyny $\rightarrow$ (II) Pearl millet:
Protogyny is a form of dichogamy where the female gynoecium matures and becomes receptive before the male anthers shed pollen.
Pearl millet (*Pennisetum glaucum*) is a highly cross-pollinated crop because of its pronounced protogynous nature.
- (D) Dioecy $\rightarrow$ (IV) Papaya:
Dioecy is a condition where male and female flowers are borne on completely separate individual plants.
Papaya (*Carica papaya*) is a classic horticultural crop with distinct male, female, and hermaphrodite plants.
This results in the sequence: (A)-(III), (B)-(I), (C)-(II), (D)-(IV).

Step 3: Final Answer:
The correct matching sequence is (A) - (III), (B) - (I), (C) - (II), (D) - (IV).