CBSE 12th Standard Biology Subject Biodiversity and Conservation Value Based Questions 2 Marks Questions 2021
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CBSE 12th Standard Biology Subject Biodiversity and Conservation Value Based Questions 2 Marks Questions 2021
12th Standard CBSE
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Reg.No. :
Biology
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You find that a lake in your neighboring area has been covered by Water hyacinth. You have contacted your friends to remove this weed. Nobody agrees to support you. How will you explain the necessity of this?
(a) -
A well- known personality killed a black buck during hunting in sacred groves of Aravali Hills in Rajasthan. Local people caught him and lodged a case in court against him. He argued that court that killing a human being is a crime but killing an animal is not crime. What is your opinion?
(a) -
A sudden decline in fruits and seeds were seen in an area where regular heavy use of insecticides was done for the past few years. Give reasons for such an outcome.
(a) -
A debate was conducted on school on the need to conserve biodiversity. One student felt. that there are so many species on the earth, why will it matter if we lose a few. Do you feel the same. Justify your answer.
(a) -
Study-1. A forest that is rich in biodiversity seems to decline in animal population. The government declared it as a biodiversity hotspot and the forest regained its species richness in few years. Study-2. A lake that is rich in marine fishes seems to decline in its species population due to overexploitation. A wise man in the area decided to worship the lake. The species population f the lake again became normal.
(a) Which values are been promoted in the above studies.
(b) Suggest some ways by which you can contribute to this concern.
(c) What would be the effect if the forest was not declared hotspot?(a)
2 Marks
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CBSE 12th Standard Biology Subject Biodiversity and Conservation Value Based Questions 2 Marks Questions 2021 Answer Keys
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Water hyacinth grows rapidly; absorb dissolve oxygen and nutrients from aquatic bodies.
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Back buck being endangered animal is prohibited from hunting; as such it is also an equal crime to that of killing a human being.
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Pollination is possible with the help of insects. Decline in insect population bees, bumble bees, birds and bats are very important pollinating agents.
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We are losing species more quickly than the evolutionary process can replace. Once a species become its role in the ecosystem is eliminated, leaving a void and weakening ecosystem function and services.
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(i) Biodiversity conservation, Ecosystem protection.
(iii) Educate people not to harm biodiversity.
(iii) Forest would be destroyed, many species of plants and animals lost.
2 Marks
