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1. Fertilisation in humans occurs in the:

2. Which tissue helps in the transfer of nutrients from mother to embryo?

3. Development of the embryo into a foetus occurs in the:

4. How long is human development inside the mother’s body?

5. What happens when the egg is not fertilised?

6. The monthly breakdown of the uterus lining is called:

7. Which disease is not sexually transmitted?

8. Which contraceptive method prevents sperm from reaching the egg mechanically?

9. Which contraceptive device is placed inside the uterus?

10. Which contraceptive method changes hormonal balance?

11. Which method involves blocking the vas deferens in males?

12. Which method involves blocking fallopian tubes in females?

13. What is the disadvantage of sex-selective abortion?

14. Which process ensures stability of population of species?

15. Why is reproduction not essential for an individual’s life?