Sexual Reproduction In Flowering Plants

Only 3 stamens remain (half of 6). Each anther has 2 lobes, and each lobe has 26 PMC, thus total PMCs = 3 × 2 × 26 = 156. Each PMC gives 4 pollen grains (male gametes), so 156 × 4 = 624 pollen grains. Each pollen grain contains 2 male gametes, so 624 × 2 = 1248 × 2 = 2496.

- A) Emasculation → IV) Removal of anthers → ii) Hybridization
- B) Triple fusion → I) Endosperm → i) Perisperm
- C) Persistent nucellus → II) Beet → iii) Castor
- D) Scutellum → III) One cotyledon → iv) Grass

Step 1: Understand the process
The megaspore mother cell undergoes meiosis to form four haploid megaspores. One functional megaspore undergoes three rounds of mitosis. Step 2: Conclusion
Hence, 1 meiotic + 3 mitotic divisions form the female gametophyte.

Step 1: Analyze Statement A)
Statement A refers to the point of attachment of seeds to the fruits. In botany, the scar on a seed where it was attached to the funiculus (stalk) inside the fruit is called the hilum. This is the anatomical location where the seed was connected to the maternal tissue of the fruit. Therefore, Statement A corresponds to Hilum. Step 2: Analyze Statement B)
Statement B describes a type of endosperm development where nuclear divisions occur without immediate cell wall formation, leading to a multinucleate cytoplasm. A classic example of free nuclear endosperm is the liquid endosperm found in a young coconut (coconut water), which later cellularizes to form the solid endosperm. Therefore, Statement B corresponds to Coconut. Step 3: Analyze Statement C)
Statement C refers to the cotyledon (seed leaf) found in plants of the grass family (Poaceae), which are monocotyledonous. The single cotyledon in grasses is highly specialized and is known as the scutellum. The scutellum is shield-shaped and plays a crucial role in absorbing nourishment from the endosperm during seed germination. Therefore, Statement C corresponds to Scutellum. Step 4: Formulate the sequence and check options
Based on the analysis from Steps 1, 2, and 3, the correct sequence matching statements A, B, and C respectively is:
A Hilum
B Coconut
C Scutellum
Thus, the sequence is Hilum, Coconut, Scutellum. Comparing this with the given options:
% Option (1) Coconut, Scutellum, Hilum (Incorrect)
% Option (2) Hilum, Scutellum, Tegmen (Incorrect for B and C)
% Option (3) Scutellum, Cashew, Coconut (Incorrect)
% Option (4) Hilum, Coconut, Scutellum (Matches our derived sequence)
Therefore, Option (4) is the correct answer.