Biology · Class 12 · Chapter 1
Sexual Reproduction in Flowering Plants
12 lessons 92 min 2 simulations
This chapter follows sexual reproduction in angiosperms from the flower bud to the seed: how the anther makes pollen and the ovule makes the embryo sac, how pollen reaches the stigma, how two fusions happen in one embryo sac, and how the ovule becomes a seed and the ovary a fruit. It ends with seeds formed without fertilisation (apomixis) and seeds holding more than one embryo (polyembryony), and it sets up the human reproduction chapter that follows.
What the exam asks
NEET asks for the wall layers of the microsporangium, the 7-celled 8-nucleate embryo sac, the ploidy of every structure (nucellus, egg, PEN, endosperm, embryo), the three kinds of pollination and which outbreeding device blocks which, and examples: cleistogamy, Vallisneria, albuminous seeds, perisperm, false fruits, parthenocarpy and polyembryony. Marks are lost by calling geitonogamy genetically cross-pollination, by counting eight cells instead of seven, and by mixing up coleoptile and coleorrhiza or pericarp and perisperm.
Lessons
12 lessons · 92 min
1The flower and its partsNCERT §1.16 min2Stamen, microsporangium and microsporogenesisNCERT §1.2.17 min3The pollen grainNCERT §1.2.17 min4Pistil, ovule and megasporogenesisNCERT §1.2.26 min5The embryo sacNCERT §1.2.210 min 1 sim6Kinds of pollination and its agentsNCERT §1.2.37 min7Outbreeding devices and pollen-pistil interactionNCERT §1.2.37 min8Double fertilisationNCERT §1.310 min 1 sim9Endosperm and embryoNCERT §1.4.1, §1.4.27 min10Seed and fruitNCERT §1.4.36 min11Apomixis and polyembryonyNCERT §1.56 min12Chapter reviewMust-know facts, traps and formulas13 min