CBSE · Class 9 · Science · Chapter 11

Reproduction: How Life Continues

Understand how living organisms reproduce and how reproduction ensures the continuation of life.

12 lessons 50 min
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Lessons in this chapter

  1. 1Asexual ReproductionPlants discovered copy and paste long before computers did.
  2. 2Sexual ReproductionLife mixes two biological recipe cards and somehow never serves the same dish twice.
  3. 3Sexual Reproduction in Flowering PlantsFlowers look peaceful while quietly running a very busy reproductive workshop.
  4. 4How Pollination Occurs in FlowersBees, birds, wind and water all moonlight as pollen delivery services.
  5. 5Fertilisation and Seed FormationA tiny pollen grain starts a journey that can end with an entire fruit.
  6. 6Sexual Reproduction in AnimalsFrom fish to butterflies, nature has never settled on just one family plan.
  7. 7Reproduction in Human BeingsThe human reproductive system is teamwork with extremely specialised team members.
  8. 8How Reproductive Cells Are MadeMeiosis carefully halves the chromosomes so fertilisation does not double the paperwork.
  9. 9What Happens When an Egg Is Not FertilisedWhen fertilisation does not happen, the uterus calmly resets for another cycle.
  10. 10Pregnancy and ChildbirthNine months of development turns one microscopic beginning into a newborn human.
  11. 11What It Means to Be Sexually MaturePuberty is the body installing a major update without providing release notes.
  12. 12Chapter Summary and PracticeThe chapter returns for one final roll call of cells, flowers, animals and humans.
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