CBSE Class 12 Biology VBQs Biology In Human Welfare Set A

UNIT VIII- Biology in Human Welfare

• After a rainy day Rahul found many dragon flies flying over stagnant water. He thinks these flies come to drink water. Is Rahul’s explanation correct? Give your views.

• Nowadays capsules of Spirulina are used as food supplements. Do you recommend the use of these capsules? Why?

• Sunita finds that after few periods of teaching classroom is littered with many small pieces of papers. Next day she delivered a speech in assembly-“if a paper is torn a branch of tree is being destroyed.” Do you agree with Sunita? Give reasons.

• Anita believes that breastfeeding her new born child would spoil her figure and also make her weak. Do you think Anita is right? If not, how would you convince her?

• Delhi govt. has recently decided to ban the sale of Gutka (this fetches them a lot of monetary gain) in the state. Do you support the decision and Why?

• You go to a super market to buy rice. Two types of products are available- one is organically grown and second is conventionally grown. The organically grown crops are costlier so your mother does not want to purchase it. Convince your mother by telling her the advantages of organic foods.

• Municipal Corporation has deputed personnel to check for mosquito breeding in your school.

a) Which are the places they should check for mosquitoes and there larvae?

b) Name to diseases which are spread by mosquitoes.

c) Name any two biological agents which can be used to control mosquitoes 

• Prabha has seen huge garbage dumps outside your school which are not being regularly disposed of by MCD. Prabha discusses the problems with school mates and decide to organize rally to spread awareness among local people about public hygiene.

• Prepare two slogans for rally

• Name any two infectious diseases which may spread due to such unhygienic conditions at public place

• Anand a 14yr old boy thinks smoking makes him more energetic and feel like adult and thus more responsible citizen. He tries to smoke when he is with his peer group. As a friend you have to educate him

• Why he feels more energetic while smoking?

• Effects of CO in smoke

• Other ill effects on body

• Ram is managing a dairy firm. He has been advised to use artificial insemination to overcome several problems in developing better breeds of cow. Govind has advised him MOET for herd improvement. Ram is ignorant and is not able to decide. How will you help Ram regarding

• Which technique should he adopt

• Procedure of new technique

• What is advantage of this technique 

Unit-8 Biology in Human Welfare

• No, Her figure will not be spoilt By telling the advantages of breast feeding.

Values

• Self awareness.

• Sense of responsibility.

• Yes Gutka increases the changes of cancer

Values

• Awareness of Govt. Policies.

• Consciousness to words health

• Advantages of organic farming like – biofertilizers and bio pesticides are used in organic farming which is not harmful to health.

Values

• Sensitivity and awareness about use of harmful chemicals

• Decision making.

• A) water tanks , flowerpots, stagnant water

• Dengue, Malaria

• Gambusia, dragonfly Values

• Observation

• Sensitivity towards health.

1) Any slogans.

2) Diseases like typhoid and amoebiasis.

Values

• Responsibility.

• Sensitivity towards public. Hygiene

• Problem solving.

 i) He fells energetic because nicotine raises blood pressure and increases heart beat. This is not good for his health.

ii) CO binds to hemoglobin and reduces concentration of oxygen 

iii) Any one effort cancer of lung, throat, emphysema. 

Values

 • Awareness about health

• Consciousness

 • Critical thinking.

 I)MOET as success rate of this technique is more

II) Cow is administered hormones, with FSH like activity, to induce follicular maturation and super ovulation-(6-8 eggs). The animal is mated. Fertilized eggs are recovered and transferred to surrogate mother.

III) Herd size is increased in short time. Genetic mother is available for another round of super ovulation. 

Values

• Critical thinking

• Problem solving.

More Questions

Q.1 After a rainy day Rahul found many dragon flies flying over stagnant water. He thinks these flies come to drink water. Is Rahul’s explanation correct? Give your views.

• No, dragon flies eat mosquito larva and act as bio control agents.

Values

• Awareness about environment

• Critical thinking.

Q.2 Nowadays capsules of Spirulina are used as food supplements. Do you recommend the use of these capsules? Why?

• Yes

Any one reason –these are rich in proteins and can be produced in large quantities in less time.

Values

• Awareness.

• Problem solving.

Q.3 Sunita finds that after few periods of teaching classroom is littered with many small pieces of papers. Next day she delivered a speech in assembly-“if a paper is torn a branch of tree is being destroyed.” Do you agree with Sunita? Give reasons.

• Yes, wood is used in manufacturing of paper.

Values

• Sense of responsibility.

• Awareness.

Q.4 Anita believes that breastfeeding her new born child would spoil her figure and also make her weak. Do you think Anita is right? If not, how would you convince her?

• No, Her figure will not be spoilt

By telling the advantages of breast feeding.

Values

• Self awareness.

• Sense of responsibility.

Q.5Delhi govt. has recently decided to ban the sale of Gutka (this fetches them a lot of monetary gain) in the state. Do you support the decision and Why?

• Yes Gutka increases the changes of cancer

Values

• Awareness of Govt. Policies.

• Consciousness to words health

Q.6 You go to a super market to buy rice. Two types of products are available- one is organically grown and second is conventionally grown. The organically grown crops are costlier so your mother does not want to purchase it. Convince your mother by telling her the advantages of organic foods.

• Advantages of organic farming like – biofertilisers and bio pesticides are used in organic farming which is not harmful to health.

Values

• Sensitivity and awareness about use of harmful chemicals

• Decision making

Q.7 Municipal Corporation has deputed personnel to check for mosquito breeding in your school.

a) Which are the places they should check for mosquitoes and there larvae?

b) Name to diseases which are spread by mosquitoes.

c) Name any two biological agents which can be used to control mosquitoes

• A) water tanks , flowerpots, stagnant water

• Dengue, Malaria

• Gambusia, dragonfly

Values

• Observation

• Sensitivity towards health.

Q.8 Prabha has seen huge garbage dumps outside your school which are not being regularly disposed of by MCD. Prabha discusses the problems with school mates and decide to organize rally to spread awareness among local people about public hygiene.

           • Prepare two slogans for rally

           • Name any two infectious diseases which may spread due to such unhygienic conditions at public place

• 1) Any slogans.

2) Diseases like typhoid and amoebiasis.

Values

• Responsibility.

• Sensitivity towards public. Hygiene

• Problem solving.

Q.9 Anand a 14yr old boy thinks smoking makes him more energetic and feel like adult and thus more responsible citizen. He tries to smoke when he is with his peer group. As a friend you have to educate him

       • Why he feels more energetic while smoking?

       • Effects of CO in smoke

       • Other ill effects on body

• i) He fells energetic because nicotine raises blood pressure and increases heart beat.

This is not good for his health.

ii) CO binds to hemoglobin and reduces concentration of oxygen

iii) Any one effort cancer of lung, throat, emphysema.

Values

• Awareness about health

• Consciousness.

• Critical thinking.

Q.10Ram is managing a dairy firm. He has been advised to use artificial insemination to overcome several problems in developing better breeds of cow. Govind has advised him MOET for herd improvement. Ram is ignorant and is not able to decide. How will you help Ram regarding

       • Which technique should he adopt

       • Procedure of new technique 

       • What is advantage of this technique

• I)MOET as success rate of this technique is more

II) Cow is administered hormones, with FSH like activity, to induce follicular maturation and super ovulation-(6-8 eggs). The animal is mated. Fertilized eggs are recovered and transferred to surrogate mother.

III) Herd size is increased in short time.

Genetic mother is available for another round of super ovulation.

Values

• Critical thinking

• Problem solving.