Natural Vegatation and Wild Life – Class 9 IX – Geography Social Science – Textbook NCERT Solutions

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TEXTBOOK  QUESTIONS  SOLVED

Q1. Choose the right answer from the four alternatives given below:
To which one of the following types of vegetation does rubber belong?
(a) Tundra
(c) Himalayas
(b) Tidal
(d) Tropical Evergreen

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Ans. – D

(ii) Cinchona trees are found in the areas of rainfall more than
(a) 100 cm
(c) 70 cm
(b) 50 cm
(d) less than 50 cm

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Ans. – A

(iii) In which of the following states is the Simlipal bioreserve located?
(a) Punjab
(c) Delhi
(b) Orissa
(d) West Bengal

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Ans. – B

(iv) Which one of the following bio-reserves of India is not included in the world network of bio-reserves?
(a) Manas
(b) Gulf of Mannar
(c) Nilgiri
(d) Nanda Devi

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Ans. – B

Q2. Answer the following questions briefly:
(i) Define an ecosystem.

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Ans. – (i) All the plants and animals in an area are interdependent and interrelated to each other in their physical environment thus, forming an ecosystem. Human beings are also an integral part of the ecosystem.

(ii) What factors are responsible for the distribution of plants and animals in India?

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Ans. –  (ii) Factors responsible for the distribution of plants and animals in India are—relief (land and soil) and climate (temperature, sunlight and precipitation).

(iii) What is bio-reserve? Give two examples?

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Ans. –  (iii) The term bio-reserve refers to a forest area where all types of flora and fauna are preserved in their natural environment.
Two examples of bio-reserve:
• Sunderbans
• Gulf of Mannar


(iv) Name two animals having habitat in tropical and montane type of vegetation.

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Ans. – • Tropical type of vegetation
– elephants and monkeys
• Montane type of vegetation
– Tibetan antelope and yak

Q3. Distinguish between
(i) Flora and fauna

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Ans. –

FloraFauna
• Natural vegetation
growing in a particular
area is referred to as flora.
• Wild life living in a
particular area is
termed as flora.
• It makes its food with
the help of solar
energy.
• It cannot make its own
food so it is dependent
upon the flora.

 

(ii) Tropical Evergreen and Deciduous Forests

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Ans. 

Tropical Evergreen ForestsDeciduous Forests
• These forests are restricted to heavy rainfall areas of the Western Ghats and the island groups of
Lakshadweep, Anadaman 86 Nicobar, upper
parts of Assam and Tamil. Nadu coasts. They are at their best in areas having more than 200cm of rainfall.
• These forests are the most widespread forests of India. They are spread over the regions receiving
rainfall between 200 ern and 70 cm. They are found in north- eastern states, Jharkhand, West Orissa, Chattisgarh, the plains of Bihar and
Uttar Pradesh.
• These forests are evergreen. It means
they do not shed their leaves in any season.
• These forests shed their leaves once a year in
order to minimise evaporation in dry seasons.
• These forests are dense• These forests are less dense.
• Ebony, mahogany, rose- wood, rubber and cinchona are important trees of these forests.• Sal, shisham, sandal- wood, neem, teak, khair, kusum, arjun, mulberry are important trees of these forests.
• Common animals found in these forests are elephants, monkeys, lemur and deer.• Common animals found in these forests are lion, tiger, pig, deer and elephants.

 


Q4. Name different types of vegetation found in India and describe the vegetation of high altitudes.

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Ans. Different types of vegetation found
(i) Tropical Evergreen forests
(ii) Tropical Deciduous Forests
(iii) Tropical Thorn Forests and Scrubs
(iv) Montane Forests
(v) Mangrove Forests
Description of the vegetation found at high altitudes:
At high altitudes, generally more than 3,600 metrs above sea-level, temperate forests and grasslands give way to the alpine vegetation. Silver fir, junipers, pines and birds are the common trees of high altitudes. However, they get progressively stunted as they approach the snow-line. Ultimately, through shrubs and scrubs, they merge into the Alpine grasslands. These are used extensively for grazing by nomadic tribes like the Gujjars and the Bakarwals. At higher altitudes, mosses and lichens form part of tundra vegetation.

Q5. Quite a few species for plants and animals are endangered in India. Why?

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Ans. Quite a few species of plants and animals are endangered in India because of the following reasons:
(i) Hunting by greedy hunters for commercial purposes. Pollution due to chemical and industrial waste.
(iii) Acid deposition.
(iv) Introduction of alien species.
(v) Reckless cutting of forests to bring land under activation and inhabitation.

Q6. Why has India a rich heritage of flora and fauna?

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Ans. Our country has a rich heritage of flora and fauna. It is one of the twelve mega bio-diversity countries of the world. With about 47,000 plant species India occupies tenth place in the world and fourth in Asia in plant diversity. There are about 15,000 flowering plants in India which account for 6 per cent in the world’s total number of flowering plants. The country has many nonflowering plants such as ferns, algae, and fungi. India also has 89,000 species of animals as well as a rich variety of fish in its fresh and marine waters.

Map Skills

Q1. On an outline map of India, label the following:
(i) Areas of Evergreen Forests
(ii) Areas of Dry Deciduous Forests
Ans. (i) and (ii)

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(iii) Two national parks each in Northern, Southern, Eastern and Western parts of the country.

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Ans. –


Project/ Activity

 

(i) Find some trees in your neighbourhood having medicinal values.

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Ans. – Tulsi, Neem, Jamun and Kachnar.

(ii) Find ten occupations getting raw material from forests and wildlife.

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Ans. – Do yourself.

(iii) Write a poem or paragraph showing the importance of wildlife.

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Ans. – Wildlife is the nature’s gift to the human beings. It is important for us in a variety of ways. It plays a major role in balancing the ecot:y stern. It maintains the bio-diversity. It forms the major component of the ecosystem and food chain. In its absence the complete ecosystem will be imbalanced. One major example of this is the Sahara Desert which was caused due to the abolition of some wildlife species.

(iv) Write the script of a street play giving the importance of tree plantation and try to enact it in your locality.

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Ans. – Importance of Tree Plantations: Trees are being cut on a massive scale nowadays. This has adverse effect on our environment. Hence, it is necessary to spread awareness among the common mass about the importance of tree plantation. Trees are the saviour of our life. They provide us a variety of things without which it is difficult for us to sustain our life. They give us nutritive fruit. There are a number of medicinal plants which can treat several diseases like blood pressure, diabetes, asthma, etc. Trees attract clouds and become the cause of rainfall which is important for life and cultivation. They play an important role in balancing the ecosystem. Tree plantation is the only way to save our life and our earth.

(v) Plant a tree either on your birthday or one of your family member’s birthday. Note the growth of the tree and notice in which season it grows faster.

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Ans. – Do it yourself.

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