Reproduction in Animals

Q1. Fill in the blanks.

                           i.        Internal fertilization occurs in female body.

                          ii.        A tadpole develops into an adult frog by the process of metamorphosis.

                         iii.        The number of nuclei present in a zygote is two.

                         iv.        Sperms are very small in size.

                          v.        In human beings, a single matured egg is released into the oviduct by one of the ovaries every month.

Q2. True/False

                          i.        Oviparous animals give birth to young ones. False

                         ii.        Each sperm is a single cell. True

                        iii.        External fertilization takes place in frog. True

                        iv.        A new human individual develops from a cell called gamete. False

                         v.        Egg laid after fertilization is made up of a single cell. True

                        vi.        Amoeba reproduces by budding. False

          vii.        Fertilization is necessary even in asexual reproduction. False

          viii.        Binary fission is a method of asexual reproduction. True

                         ix.        A zygote is formed as a result of fertilization. True

                          x.        An embryo is made up of a single cell. False

Q3. Name two animals which reproduce sexually.

Ans. Cow, Elephant

Q4. Name two animals which reproduce asexually.

Ans. Hydra, Amoeba

Q5. Which type of reproduction involves gametes?

Ans. Sexual reproduction

Q6. Which type of reproduction does not involve gametes?

Ans. Asexual reproduction

Q7. What is another term for a fertilised egg?

Ans. Zygote

Q8. Name the reproductive process which involves two parents.

Ans. Sexual reproduction

Q9. Name the reproductive process which involves one parent.

Ans. Asexual reproduction

Q10. What type of fertilization takes place in hen?

Ans. Internal fertilization takes place in hen.

Q11. Name the organs which produce sperms in human.

Ans. The testes produce sperms in human.

Q12. What are the male gametes in humans called?

Ans. The male gametes in humans are called sperms.

Q13. What are the female gametes in humans called?

Ans. Female gametes in humans are called ova (eggs).

Q14. Name the organs which produce female gametes.

Ans. Ovaries produce female gametes.

Q15. Name the parent sheep of which dolly was a clone.

Ans. Finn Dorsett sheep

Q16. Where does a fertilized egg (or zygote) develop into a baby?

Ans. A fertilized egg (or zygote) develops into a baby in the uterus.

Q17. What are the reproductive organs of male?

Ans. The reproductive organs in male include testes, sperm ducts and penis.

Q18. What term is used for bulges observed on the sides of the body of hydra?

Ans. Buds

Q19. What is the name given to the fusion of male and female gametes?

Ans. Fertilization is the name given to the fusion of male and female gametes.

Q20. What are the reproductive organs of female?

Ans. The reproductive organs in the female include ovaries, oviducts and uterus.

Q21. What is foetus?

Ans. The stage of the embryo in which all the body parts can be identified is called a foetus.

Q22. In which female reproductive organ does the embryo get embedded?

Ans. The embryo gets embedded in the wall of the uterus for further development.