Biology · Class 12 · Chapter 1
Sexual Reproduction in Flowering Plants
12 lessons101 min5 simulations10 practice questions
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.
Also called: pollination · double fertilisation · plant reproduction
Lessons
12 lessons · 101 min
01The flower and its partsNCERT §1.16 min02Stamen, microsporangium and microsporogenesisNCERT §1.2.17 min03The pollen grainNCERT §1.2.17 min04Pistil, ovule and megasporogenesisNCERT §1.2.26 min05The embryo sacNCERT §1.2.210 min1 sim06Kinds of pollination and its agentsNCERT §1.2.310 min1 sim07Outbreeding devices and pollen-pistil interactionNCERT §1.2.310 min1 sim08Double fertilisationNCERT §1.310 min1 sim09Endosperm and embryoNCERT §1.4.1, §1.4.210 min1 sim10Seed and fruitNCERT §1.4.36 min11Apomixis and polyembryonyNCERT §1.56 min12Chapter reviewMust-know facts, traps and formulas13 min
Simulations
5 in this chapter
Building the embryo sacIn: The embryo sacDesign a flower for wind or for beesIn: Kinds of pollination and its agentsWhich devices stop selfing?In: Outbreeding devices and pollen-pistil interactionPloidy map of the fertilised ovuleIn: Double fertilisationEndosperm first, then the embryoIn: Endosperm and embryo