Flower structure
Male organs: stamens (anthers + filaments). Female organs: pistil (stigma + style + ovary). Sepals and petals: protection and attraction.
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Lesson overview
This lesson brings together the PDF, study notes and chapter flow so you can revise Sexual Reproduction - Flowering Plants without losing the thread.
Flower structure
Male organs: stamens (anthers + filaments). Female organs: pistil (stigma + style + ovary). Sepals and petals: protection and attraction.
Pollination
Transfer of pollen grains from stamens to stigma. Cross-pollination (between different flowers) or self-pollination.
Fertilization
The pollen tube grows toward the ovule. Fusion of male gamete with female gamete → zygote → embryo.
Seed and fruit
Fertilized ovule → seed. Ovary → fruit. Seed contains embryo + cotyledons + testa (seed coat).
Observation 1 - Flower Reproduction
Microscopic analysis.
Observation 2 - Flower Reproduction
Microscopic analysis.
Observation 3 - Flower Reproduction
Microscopic analysis.
Observation 4 - Flower Reproduction
Microscopic analysis.
Observation 5 - Flower Reproduction
Microscopic analysis.
Observe → describe → explain
Start from facts (document/experiment), then build a reasoned scientific explanation.
Precise scientific vocabulary
Use exact terms: ecological factor, valence, productivity, biotope, biocenosis, reproduction.