Exercise Solutions Available
Step-by-step answers for all textbook questions in this chapter
Instructions
- Time: 45 minutes
- Total marks: 30
- Draw labelled diagrams wherever required.
Portion Covered
- Reproduction in Organisms
- Human Reproduction
- Reproductive Health
- Principles of Inheritance and Variation
- Molecular Genetics
Section A — One Mark Each
1. Define reproduction. 2. Name one organism that reproduces by budding. 3. State the site of fertilisation in humans. 4. What is implantation? 5. Name one barrier contraceptive. 6. Expand IVF. 7. What is a gene? 8. Name the nitrogenous base absent in RNA. 9. What is mutation? 10. Name the structure that nourishes the developing embryo.
Section B — Two Marks Each
1. Distinguish between asexual and sexual reproduction. 2. Write the phases of menstrual cycle. 3. State any two methods of contraception. 4. Distinguish between DNA and RNA. 5. Write any two reasons why variation is important.
Section C — Five Marks Each
1. Explain fertilisation, implantation, and pregnancy in humans. 2. Explain the methods of contraception. 3. Explain the structure of DNA with a neat labelled diagram.
Answer-Writing Guide
- Keep biological sequences in order.
- Use exact terms such as gamete, zygote, implantation, and placenta.
- For reproductive-health answers, classify before explaining.
- Add diagrams wherever the textbook expects one.
Self-Review Checklist
- [ ] I labelled diagrams clearly.
- [ ] I used correct biological terms.
- [ ] I kept reproductive processes in sequence.
- [ ] I classified contraception methods properly.
- [ ] I corrected every weak answer after review.