class8

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Here are 10 multiple-choice questions based on the provided text, with one correct option for each:
 * What is biodiversity?
   a) The variety of plants in a specific region.
   b) The variety of life found on Earth, including microorganisms, plants, animals, and the ecosystems they form.
   c) The study of ancient life forms.
   d) The interaction between humans and animals.
 * Which of the following is NOT mentioned as a component of biodiversity?
   a) Microorganisms
   b) Plants
   c) Artificial intelligence
   d) Animals
 * What is a major threat to the existence and survival of organisms, as stated in the text?
   a) Climate change
   b) Deforestation
   c) Urbanization
   d) Pollution
 * What does deforestation primarily involve?
   a) Planting new trees.
   b) Clearing forests and using the land for other purposes.
   c) Protecting endangered species.
   d) Studying forest ecosystems.
 * According to the text, what is a consequence of clear-cutting vast tracts of land?
   a) It helps in creating new habitats.
   b) It does not destroy trees.
   c) It makes it difficult for animals and organisms to survive.
   d) It increases biodiversity.
 * How does deforestation impact food chains?
   a) It strengthens food chains.
   b) It has no effect on food chains.
   c) It disrupts food chains, resulting in a grave imbalance in the population of various species.
   d) It creates new food sources.
 * What is the intrinsic part of an ecosystem, according to the text?
   a) Human activities
   b) Plants and animals
   c) Non-living components
   d) Geological formations
 * How many species of plants, animals, and microbes on Earth are estimated by the UN Environmental Programme?
   a) Less than a million
   b) Around 5 million
   c) More than 13.6 million
   d) Exactly 10 million
 * For what reasons are humans dependent on the vast biological wealth?
   a) Only for recreation.
   b) For food, housing, medicine, clothes, and recreation.
   c) Solely for scientific research.
   d) To export natural resources.
 * What responsibility do humans have regarding the extinction of wild animals and plants?
   a) They are not responsible.
   b) They are solely responsible.
   c) They are partially responsible.
   d) Their role is negligible.

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