Module: | Embryo, Seed, Fruit & Apomixis
Q100: Consider the following statements regarding post-fertilization anatomical transformations in angiosperms:
1. Following successful double fertilization, the entire ovary matures and ripens to form the fruit, while the ovules contained within mature into seeds.
2. The outer integument of the ovule hardens to form the thick testa, and the inner integument forms the thin tegmen of the mature seed coat.
3. The primary endosperm nucleus (PEN) degenerates completely, while the two synergids proliferate rapidly to form the nutritive endosperm tissue.
Which of the above statements is/are correct?
2. The outer integument of the ovule hardens to form the thick testa, and the inner integument forms the thin tegmen of the mature seed coat.
3. The primary endosperm nucleus (PEN) degenerates completely, while the two synergids proliferate rapidly to form the nutritive endosperm tissue.
Which of the above statements is/are correct?
✅ Correct Answer: A
The correct option is A. Statements 1 and 2 are correct, but Statement 3 is biologically incorrect.
The culmination of sexual reproduction in flowering plants is the complete structural metamorphosis of the floral organs.
Causally triggered by hormonal shifts after syngamy, the petals, sepals, and stamens generally wither and fall.
The massive ovary wall swells and differentiates into the pericarp (fruit), serving to protect and disperse the offspring.
Inside, the fertilized ovule transforms into the seed.
The protective envelopes of the ovule (integuments) undergo severe dehydration and sclerification; the outer integument becomes the tough outer seed coat (testa), and the inner integument becomes the membranous inner layer (tegmen). Statement 3 describes a completely reversed physiological fate.
The synergids, having completed their role of guiding the pollen tube, degenerate immediately.
It is the triploid primary endosperm nucleus (PEN) that proliferates massively to form the endosperm tissue, ensuring the survival of the zygote.
The culmination of sexual reproduction in flowering plants is the complete structural metamorphosis of the floral organs.
Causally triggered by hormonal shifts after syngamy, the petals, sepals, and stamens generally wither and fall.
The massive ovary wall swells and differentiates into the pericarp (fruit), serving to protect and disperse the offspring.
Inside, the fertilized ovule transforms into the seed.
The protective envelopes of the ovule (integuments) undergo severe dehydration and sclerification; the outer integument becomes the tough outer seed coat (testa), and the inner integument becomes the membranous inner layer (tegmen). Statement 3 describes a completely reversed physiological fate.
The synergids, having completed their role of guiding the pollen tube, degenerate immediately.
It is the triploid primary endosperm nucleus (PEN) that proliferates massively to form the endosperm tissue, ensuring the survival of the zygote.