Sexual Reproduction in Flowering Plants
A flower looks like a decoration, but it is a machine for making seeds. In this chapter you open a flower and follow the pollen grain from the anther to the stigma, down the style and into the ovule. You see how the embryo sac forms, why a flowering plant fertilises twice, and how an ovule becomes a seed and an ovary becomes a fruit. You also meet the plants that make seeds without fertilisation. It serves the Indian syllabus (NCERT, NEET) and the matching topic of A-Level, IB and AP. Python counts spores, nuclei and chromosomes.
Part of Biology · High School (11–12) (chapter 19)
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The Flower, the Stamen and the Male Gametophyte
What is inside a flower, and how does it make pollen? You open the anther, study the layers of its wall, and follow the cells that divide to form pollen grains. Then you look at one pollen grain closely and see why it counts as a male gametophyte. It serves the Indian syllabus (NCERT, NEET) and the matching topic of A-Level, IB and AP.
The Female Gametophyte, Pollination and Pollen-Pistil Interaction
How does an ovule make an egg, and how does pollen reach it? You study the pistil and the ovule, and follow the cell that divides to make the seven-celled embryo sac. Then you meet the kinds and agents of pollination, the devices that prevent self-pollination, and the dialogue between pollen and pistil. It serves the Indian syllabus (NCERT, NEET) and the matching topic of A-Level, IB and AP.