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Standard VIII
Biology
Extinction
The hunter ga...
Question

The hunter gatherers settled and learnt to cultivate plants and animals to meet the requirement of food for a larger population and other commercial needs. This lead to the _______ .

A
first wave of extinction
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B
second wave of extinction
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C
third wave of extinction
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D
prevention of extinction
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Solution

The correct option is B second wave of extinction
∙ The second of wave of extinction started when the humans realised the need to settle down to meet the demand of the larger population. They began to cultivate plants and manage animals for their food requirements. This is called as agriculture.
∙ The first wave of extinction of animals and plants corresponds to the migration of early humans. The early humans were hunter-gatherers and used the environment by killing animals.
∙ Discovery of fossil fuels by modern humans led to industrialisation. This led to the third wave of extinction of animals and plants.

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Q. Some hunters are roaming in the plush green forest of Africa. They spot a deer and kill it. They decide to roast the deer there and then and eat it. When the hunters had just finished enjoying the feast of roasted deer, a lion attacks them. The lion kills one of the hunters and eats his flesh.
(a) write a food chain which provides food to lion in this case.
(b) Which animal (other than deer) the lion could look for food if he did not get the hunter as prey?
(c) Which other animal in the forest could have been in place of lion?
(d) How does the above food chain differ form the food chain such as : plants → goat → man?

Q. Write one word for the following.
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2. Plants of the same kind grown on a large scale for food, clothing, etc. ....................
3. Process of loosening and turning the soil ....................
4. A tool used to plough the soil ....................
5. Process by which chemical fertilizers may get washed into water bodies ....................
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7. Artificial application of water to the soil ....................
8. Undesirable plants ....................
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Q. The hunter-gatherers settled and they began 'agriculture'. It led to:
Q. Some hunters are roaming in the plush green forest of Africa. They spot a deer and kill it. They decide to roast the deer there and then and eat it. When the hunters had just finished enjoying the feast of roasted deer, a lion attacks them. The lion kills one of the hunters and eats his flesh.
(a) write a food chain which provides food to lion in this case.
(b) Which animal (other than deer) the lion could look for food if he did not get the hunter as prey?
(c) Which other animal in the forest could have been in place of lion?
(d) How does the above food chain differ form the food chain such as : plants → goat → man?
Figure
Q. The first wave of extinction of animals and plants corresponds to the migration of early humans who were hunter-gatherers. They used the environment by killing animals. They did so to :
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