Important questions and answers on the chapter how do organisms reproduce

 1.Write two examples for the organisms that reproduce by binary fission.

Answer: Amoeba, Leishmania.

2.How the process of budding in hydra is different from Bryophyllum?

Answer: In hydra, a bud develops as an outgrowth due to repeated cell division at one specific site. These buds develop tiny individuals and when fully mature, detach from the parent body and become new independent individuals.

3. What are the functions performed by the testis in human beings?

Answer: Testes perform two main functions in human body.

i) Production of germ cells or sperms.

ii) Secretion testosterone

hormone which induces secondary sexual characters at puberty.

4. Why does menstruation occur? How does uterus prepare to receive the fertilized egg in woman? What happens if egg does not fertilise? Explain.

Answer: The uterus prepares itself every month to receive a fertilized egg. Its lining becomes thick and spongy. But if fertilization does not occur then this lining of the uterus breaks down along with blood vessels. The degenerated part of uterus along with the blood moves out of the vagina in the form of bleeding, called menstruation.

5. Asexual reproduction takes place through budding in 

A)Amoeba 

B) Yeast 

C) Plasmodium 

D) Leishmania 

Answer: B) Yeast 

6. Which of the following is not a part of the female reproductive system in human beings?

A) Ovary  B) Uterus 

C) Vas deferens D) Fallopian tube 

Answer: Vas deferens  

7. The anther contains 

A) sepals b) ovules 

C) carpel d) pollen grains

 Answer: d) pollen grains

8. How does binary fission refer from multiple freezing binary fission farmington of 2.0 sales from the mademoiselle undertaken under optimal conditions are a mean by and leaf manual multiple things information of many daughters is from the mother of cylinder take another address conditions apply sodium

9. How will an organism be benefited if it produces through Spurs answer sports or small hands dispersed by air and help in spreading the organisms for and wide all daughter cells from the true sparse or genetically similar sperms can also function as means of passage through on favourable conditions.

10. Can you think of a reasons why more complex organisms cannot raise give rise to new individuals through regeneration in complex organisms specialised cells can form last tissues and organs but not the complete individual as they have highly differentiated tissues and organs tomorrow complete complex organisms cannot give rise to new individuals through regeneration why is vegetative propagation practice for growing some types of to answer vegetative type of reproduction he is a boon or going to farmers how lions can be a flowers and fruits earlier than those produced from seeds plants produced or genetically identical deserve characters can be maintained indefinitely why is DNA copying and you central part of the process of reproduction during rapid action new cells during reproduction new cells are formed which must carry the same amount of DNA ascent in the parent cell phenomenon of reproduction how is the process of pollination different from fertilization of a flower