ranjana and shilpi had a hot argument whether or not life is still originating on the earth today.Their neighbour Mr kamal mishra to the girl called them and explained the matter in details.
(i)As a student of biology,what is your answer to the question ? why?
(ii)Recall the experiment of Miller,which simulated the primitive atmosphere
(a)What were the products obtain his experiment
(b)How aws energy provide in experiment?
(iii)What would have energy source for orgin of life on the earth?
(iv)Indicate the value shown by Mr.kamal mishra?

Samya visited a zoo with her mother on watching the cheetah she wondered how he uses his forelimbs for running.While the same forelimbs in bats are used for flying.she want to know about it ask her mother about it.Her mother explains different animal groups for different functions.
(i)What are such organs called?
(ii)Give an example of such organs from the plant world
(iii)What led to the origin of such organs?
(iv)What are the values shown by samya?

Doctor are worried about antibiotics resistance in disease causing bacteria such as Mycobacterium and are using DNA fingerprinting technique for screening of resistance bacteria.
Read the above passage and answer the following questions:
(i) What is antibiotics?
(ii) What are the possible reasons for development of resistance in bacteria to antibiotics?
(iii) How can DNA fingerprinting be helpful in controlling growth of such bacteria?

One day, while returning home from school, Anil saw a crowd gathering front of Mr. Sharma's house. He asked his mother about it. She told that Mrs. Sharma gave birth to a child with small tail. Many people gathered just for curiosity and some whispered that it is a bad omen.
Read the above passage and answer the following questions:
(i) What is your opinion about child?
(ii) What is atavism?
(iii) What will be your role as a good citizen and student of biology?

One day, father complained of severe pain in the abdomen. Naresh took him to doctor for examination. Doctor diagnosed it to be a case appendicitis and advised immediate surgical removal of vermiform appendix.
Read the above passage and answer the following questions:
(i) What is appendicitis?
(ii) What is vermiform appendix?
(iii) What value was displayed by Naresh?