HSC Biology 2026 - Important Questions and Diagrams
Important Questions
Section 1: Genetics and Evolution
- What is Mendel's law of segregation?
- Explain the dihybrid cross with suitable example.
- Define and explain sex-linked inheritance.
- Write a note on Darwin's theory of evolution.
Section 2: Reproduction
- Structure of human sperm with function.
- Explain menstrual cycle with hormonal control.
- Write a note on fertilization in humans.
- Describe structure and function of placenta.
Section 3: Biotechnology and Its Applications
- What is PCR? Write its steps.
- Explain steps in recombinant DNA technology.
- Write applications of biotechnology in agriculture and medicine.
Section 4: Human Health and Diseases
- What is AIDS? Explain causes and prevention.
- Differences between active and passive immunity.
- Write about cancer and its causes.
- Explain structure and role of antibodies.
Section 5: Environmental Issues
- Effects of global warming.
- Write a note on ozone depletion.
- Differences between renewable and non-renewable resources.
- What are biodegradable and non-biodegradable pollutants?
HSC Biology 2026 - Important Questions and Diagrams
Important Diagrams
Important Diagrams to Practice:
1. Human male reproductive system
2. Human female reproductive system
3. Structure of a sperm
4. Structure of ovum
5. TS of Testis
6. TS of Ovary
7. DNA double helix structure
8. L.S. of flower (for plant reproduction)
9. Mendel's monohybrid and dihybrid cross (Punnett square)
10. Lac Operon Model
11. Structure of Antibody
12. PCR cycle steps (if diagram is asked)