CBSE Biology Value Based Questions (VBQs) for Class 9 and 10


Class 9 and Class 10 CBSE Biology VBQs 

CBSE Guess and Guide

CBSE (Central Board of Secondary Education) has introduced 'Value Based Questions' (VBQs) of 3 to 5 marks in 15 subjects including almost all the major subjects in Class X and Class XII CBSE Board Examinations from 2013. The following questions are an attempt to develop a CBSE Biology Value Based Questions Bank (VBQs) for Class 9 and Class 10 CBSE Board Examinations.

CBSE Biology - Value Based Questions Bank

Question 1: During her tour to a renowned forest, Sakshi found a highway being constructed which passes through the middle of the forest. This made her quite unhappy and on return she approached the concerned department of the local Ecological Society and asked them to stop this construction.
(a) What values did Sakshi reflect here?
(b)  In your opinion what would be the effect on biodiversity if the highway is constructed.
Answer: (a) Love for nature and environmental consciousness. She was brave and had a vision to see the disaster in the future.
(b) Existence of the forest habitat of that place would be disrupted since animals will be confined to a smaller area. Fragmentation characteristically reduces species richness and taxon diversity, and may reduce to efficacy of ecosystem functioning. This not only reduces the amount of functional habitat, but it may also isolate a species population into subpopulations, that may be adequately near the minimum viable population size, to risk local extinction from successive demographic processes or catastrophic events.     
Question 2: Arman, while passing by a street stopped to see some children gathering in front of a road-side tree. He got annoyed as he saw those children were throwing stones at a snake on the tree which was trying to protect itself by moving up & down.  Immediately Arman stopped the children from throwing stones and called the snake help line number.
(a) Do you think Arman did the right thing & why ?
(b) What values did he show ?
(c) What do the persons working with snake helpline do?
(d) Can you name an Organization working for animals?
Answer: (a) I think Arman did the right thing by showing his concern for an animal which was in trouble.
(b) Love and concern about nature and biodiversity.
(c) The persons working in the snake-helpline visit the spot, catch the snake live nad then leave them in their natural habitat.
(d) People for Animals. 
Question 3: Ravi was rushed to a nearby hospital after an accident which caused heavy bleeding. He needed blood immediately. But the hospital failed to provide 'O' negative blood for transfusion. Rehman who was attending a patient learned about the situation and being of the same blood group agreed to donate blood. Ravi's mother initially refused but agreed later after being convinced by her daughter.
(a) What values and similarities do you find in the thinking of Ravi's sister and Rehman ?
(b) Why can't 'O' positive blood be transfused into Ravi's body ?
(c) What is the genetic basis of blood group inheritance ?
Answer: (a) humanity is above all religion. ravi’s sister shows understanding of science. Rehman believes in helping a person in need without thinking about which religion or caste he belongs to.
(b) ‘O positive’ blood group contains antigen for ‘Rh factor’ while ‘O negative’ blood lacks antigen. So if the two bloods mix it will cause blood clotting resulting in death of the patient.
(c) Human blood groups are ‘A’, ‘B’, ‘AB’ and ‘O’. These four phenotypes are expressed by paired combination of three alleles (lA, lB and I). IA and IB are dominant alleles for blood groups ‘A’ and ‘B’ respectively. Blood group ‘O’ is due to lack of any dominant gene. Its genotype is II. Allele IAIB expresses both dominant traits and the blood group is ‘AB’.     
Question 4: Aditya participated in a group discussion in his school on "The ill effects of the tobacco on human health". In the evening he goes with his family for dinner and insists on sitting in the "Non-smoking Zone" to which his father (who is a chain-smoker) objects.
(a) In this situation who wind your support - Aditya's concern for health and environment or his father's objection ? Justify giving two reasons.
(b) Suggest any three effective propaganda campaigns for Anti-Tobacco awareness.
(Courtesy: CBSE website for question 4)
Answer: (a) I will support Aditya’s concern for the health of his family. Both Active as well as Passive smoking is injurious to health as smoking is associated with increased incidence of concerns of lungs, urinary bladder, throat and oral cavity, bronchitis, emphysema / coronary heart disease, gastric ulcer etc.
(b) Propaganda Campaigns for Anti-tobacco Awareness:
1. By printing statutory warning on cigarette packets.
2. Through advertisement in mass media such as TV, Newspaper etc.

3. Discourage smoking by designating public places as Non-smoking Zones.      

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