E. Answer the following questions. 1. State any five ways in which animals are useful to us. 2. Differentiate between extinct and endangered animals. Give two example, of each type. 1 3. What is wildlife trade? Why is it harmful? 4. Suggest any four steps to prevent cruelty to animals. 5. Some wild animals are hunted because their body is considered useful by man. Give four examples of such wild animals. Also mention the pan of the body which is used in each case.
Answers
Answer:
Explanation:A forest is an area where the earth is covered mainly by a very large number of
trees. The very large number of trees, in a forest, support many life forms.
Trees are an important component of the forests. They clean the air, cool it on
hot days, conserve heat at night and act as excellent sound absorbers.
Forests create a special environment, which in turn, affects the kinds of animals
and plants that live and survive there. Forests develop at places where the average
temperature is greater than 10°C and where there is an annual rainfall of at least
200 mm.
For early man, forest was his home where he got food and shelter.
Human beings and forests have always had a complex relationship. We have
always been dependent on forests for getting clean air, food, fuel, water, shade and
shelter. Thus, forests play multiple roles to take care of our basic needs.
FORESTS
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Forest
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Let us now try to understand how forests play all these roles.
Advantages of Forests
Forests help us in the following ways:
) The trees purify the air by absorbing carbon dioxide and releasing
oxygen. This helps to maintain the climate balance over a large area.
) Trees also help in checking global warming by absorbing carbon dioxide
which is the main greenhouse gas.
) Forests act as natural absorbers of rain water. The soil, held by roots
of trees, soaks in the rain water. A large portion of rain water seeps
down the soil. This recharges the ground water.
) Forests prevent soil erosion. Trees bind soil particles with their strong
roots. This prevents soil from being washed, or blown away.
) Forests prevent floods as the soil, held by roots of trees, absorbs
running water and prevents floods.
) Forests help to bring good rainfall. This leads to more greenery around
and better crops.
) Forests also serve as home to many types of animals. These include
mammals, reptiles, insects, birds and wild animals.
Forest Products
Forests provide a number of things that are used by
humans. Some forest products are:
1. Wood/Timber: Wood, obtained from trees in
forests, is used for making furniture. It is also
used for making paper and as a fuel.
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2. Medicines and spices: A number of medicines are obtained from forests.
Medicinal plants, like amla, aswagandha and brahmi, grow in forests. Some
spices are also obtained from forests.
Amla Aswagandha Spices
3. Gums, resins and dyes: Gums are used for making adhesives and in
medicines. Some varieties of gums are used as food. Many resins are used
to make varnish and paint. Many dyes, used to colour clothes and paper, are
also obtained from forests.
Resins Powder Dyes Gums
4. Special leaves: Areca nut leaves are used to make disposable plates. Tendu
leaf is also called green gold of Odisha. The leaves of Tendu are used for
particular wrapping purposes.
Tendu leaves Binding tendu leaves
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5. Honey: Large beehives are found in forests that are used for extraction of