CBSE Class 9 · Science
Reproduction: How Life Continues
Official NCERT chapter from Science (Grade 9, 2026 edition) (book code iesc1). ExamMaster notes are original teaching at CBSE Class 9 depth.
This lesson follows the official chapter “Reproduction: How Life Continues” in Science (Grade 9, 2026 edition). The words below are ExamMaster’s teaching, not a paste from the book. Use the NCERT chapter for the classroom sequence; use these notes to hold the idea without copying exercises or figures.
- CBSE Class 9
- Medium level
- 8 concepts
1Asexual Reproduction
Asexual reproduction at this class is a one-parent restart: a new living thing from one body by a taught split, bud, or runner — a stage-name, not a how-to. The young is a copy-story as the lesson framed it. One Hydra-or-plant case the book used is enough.
A photocopier joke is not the living job.
Figure. Asexual reproduction is a one-parent split: one body makes two same offspring. Binary fission and budding both pass this test. A second parent is not on the page.
How it works
- Name one parentThe start.
- Name the taught restart (split, bud, runner)The job.
- Stop — no extra private how-toSchool size.
2Sexual Reproduction in Animals
Sexual reproduction in animals is a two-parent story: two special cells (gametes as a stage-name) join, as taught, and a new body can start. Join is a named job on a life-map, not a film. Keep only the signs and names the lesson used.
Curiosity about a classmate’s body is not a classroom measurement.
Figure. Sexual reproduction in animals is a two-gamete fuse: sperm plus egg make one zygote. The school test is two parents’ cells meeting, not a cartoon of the animals.
How it works
- Name two parents as the lesson didThe two-parent story.
- Name the join as a stage on the mapGametes, fertilisation — as taught words.
- Stop — no extra private how-toSchool size.
3Reproduction in Human Beings
Reproduction in human beings here is a named-jobs map: organs as stage-names, a join as a stage-name, a growth-span as a stage-name — only what the lesson listed. Human is not a reason to add rumour or a film scene as if it were the given.
A film scene is not the given.
Figure. Human reproduction at Class 9 is the same fuse, then growth: sperm + egg → zygote → child. The figure is a stage strip of boxes, not a drawing of organs.
How it works
- Copy the taught job-listThe map.
- Keep each name as a job on that mapStage-names.
- Refuse a rumour or a how-to extraSchool size.
4A definition is a test you can run
Reproduction is a test: one parent or two, plus a taught restart-job. If you only say “life continues”, you have a heading.
Using the word as a joke is not the definition.
Figure. A definition is a test you can run. Living means jobs — grow, take food, make young — not a pretty look. A toy dog fails those jobs even if it looks like a dog.
How it works
- Name one-parent or two-parentThe object.
- Name the taught restartThe test.
- Then the word has contentThe definition ran.
5Name the given before the unknown
The given is what the lesson named. The unknown is asexual versus sexual, or a human job-name. Do not add a rumour as if it were given.
A film scene is not the given.
Figure. Name the given before the unknown: count parents first. One parent names asexual; two gametes meeting names sexual. The mode-word comes after the count.
How it works
- Copy the taught listThe given.
- Name which heading you are answeringThe unknown.
- Stay inside the listGiven first.
6One worked case is enough at this class
One honest case (one bud, or one two-parent map) is enough. A page of the same runner-clone does not add a new human job.
Ten twins of “life continues” are still one heading.
Figure. One worked case is enough at this class: a hydra with one bud already shows asexual budding. A catalogue of every animal is not a new idea.
How it works
- Write one restart-sentenceThe case.
- A second only to check you did not add a rumourOptional.
- StopThis class.
7A miss: swapping the school name for the picture
A nest-photo is a setting. The science is one-parent or two-parent plus a taught job. Cute is not asexual.
A cartoon stork is not the map.
Figure. A miss is swapping the school name for the picture: labelling a toy “living” while no job — grow, feed, make young — is happening. The jobs are the picture.
How it works
- Keep the nest as a storyA setting.
- Name the parent-count and the jobThe science.
- Stay with the lesson’s listDo not swap.
8Check by the opposite action or the opposite test
Check a sort by the parent-count: one → asexual as taught; two plus a join-stage → sexual as taught. A human job-name that was not on the list fails the opposite test.
A rumour that “everyone already knows” is not the check.
Figure. Check by the opposite test: asexual is one parent; sexual is two gametes. If you claimed asexual and a second parent is required, the claim fails.
How it works
- State one-parent or two-parentThe claim.
- Match it to the taught restartThe check.
- Drop extras that were not listedHonest.
Asexual reproduction here is
- A one-parent restart with only the job the lesson named
- A how-to
- A two-parent join always
School size; no extra private detail.
Notes
- Mapped to the official NCERT chapter “Reproduction: How Life Continues”. Original teaching only — no textbook sentences.
- Science here is Physics, Chemistry and Biology ideas at this class, never a language or social-science chapter.
Recap
Hold these pegs from the official chapter “Reproduction: How Life Continues”. The wording is ExamMaster’s teaching, not a textbook recap.
- Asexual Reproduction
- Asexual reproduction at this class is a one-parent restart: a new living thing from one body by a taught split, bud, or runner — a stage-name, not a how-to.
- Sexual Reproduction in Animals
- Sexual reproduction in animals is a two-parent story: two special cells (gametes as a stage-name) join, as taught, and a new body can start.
- Reproduction in Human Beings
- Reproduction in human beings here is a named-jobs map: organs as stage-names, a join as a stage-name, a growth-span as a stage-name — only what the lesson listed.
- A definition is a test you can run
- Reproduction is a test: one parent or two, plus a taught restart-job.
- Name the given before the unknown
- The given is what the lesson named. The unknown is asexual versus sexual, or a human job-name. Do not add a rumour as if it were given.
- One worked case is enough at this class
- One honest case (one bud, or one two-parent map) is enough.
Practise Reproduction: How Life Continues
Reading is free and needs no account. Practice, mocks and progress live in the app.
- A 4-question practice set that ends the chapter
- 1 quick check with worked explanations
- Timed mocks scored with the real marking scheme
- Readiness tracked per topic, kept on your device