Science - Class 8 (C ...

Q1. Fill in the blanks.

                           i.        Internal fertilization occurs _______________________.

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

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

                         iv.        Sperms are very ___________ in size.

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

 

Q2. True/False

                            i.        Oviparous animals give birth to young ones. ________

                           ii.        Each sperm is a single cell. ________

                          iii.        External fertilization takes place in frog. ________

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

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

                          vi.        Amoeba reproduces by budding. _________

          vii.        Fertilization is necessary even in asexual reproduction. _________

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

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

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

 

Q3. Name two animals which reproduce sexually.

 

Q4. Name two animals which reproduce asexually.

 

Q5. Which type of reproduction involves gametes?

 

Q6. Which type of reproduction does not involve gametes?

 

Q7. What is another term for a fertilised egg?

 

Q8. Name the reproductive process which involves two parents.

 

Q9. Name the reproductive process which involves one parent.

 

Q10. What type of fertilization takes place in hen?

 

Q11. Name the organs which produce sperms in human.

 

Q12. What are the male gametes in humans called?

 

Q13. What are the female gametes in humans called?

 

Q14. Name the organs which produce female gametes.

 

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

 

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

 

Q17. What are the reproductive organs of male?

 

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

 

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

 

Q20. What are the reproductive organs of female?

 

Q21. What is foetus?

 

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