Post-fertilisation Structures and Events — Predicted 2026
AI-Predicted Question Angles for UPSC 2026
Hormonal control of fruit and seed development
mediumWhile not explicitly detailed in NCERT for post-fertilisation events, the role of hormones (like auxins, gibberellins) in fruit ripening and parthenocarpy is a crucial biological concept. NEET could ask about the hormones involved in inducing parthenocarpy or the general hormonal regulation of fruit development. This tests a deeper understanding of plant physiology integrated with reproduction.
Detailed comparison of monocot vs. dicot embryo development and mature seed structure
highNEET often tests comparative anatomy and development. A question could involve a diagram-based identification of monocot/dicot embryo parts (e.g., scutellum, coleoptile, coleorhiza vs. two cotyledons, epicotyl, hypocotyl) or a direct comparison of their developmental pathways and mature seed characteristics (e.g., position of plumule/radicle, presence of endosperm). This requires a thorough understanding beyond basic definitions.
Significance of seed dormancy and factors affecting it
mediumSeed dormancy is a critical aspect of seed biology, ensuring survival under unfavorable conditions. While directly part of seed biology, it's a post-fertilisation event. Questions could explore the advantages of dormancy, the factors that break it (e.g., chilling, light, scarification), or the role of hormones (e.g., ABA for dormancy, gibberellins for germination). This links the topic to environmental adaptations and plant physiology.
Ploidy levels of various structures within the developing seed
highPloidy levels (n, 2n, 3n) are fundamental to genetics and reproduction. Questions frequently ask for the ploidy of the zygote, endosperm, nucellus, egg cell, synergids, antipodals, and primary endosperm nucleus. This is a direct test of understanding the outcomes of meiosis and fertilisation events.