Class 9 Natural Vegetation and Wild Life Important Questions VSA

Class 9 Natural Vegetation and Wild Life Important Questions VSA

Question 1.

What is natural vegetation or virgin vegetation?
Answer:
It refers to a plant community which has grown naturally without human aid, and has been left undisturbed by human beings for a long time.

Question 2.
What is flora and fauna?
Answer:
Flora – Plants of a particular region or period.
Fauna – The species of animals.

Question 3. “Land and soil affects the natural vegetation directly and indirectly.” Justify by giving two examples. Answer: The sandy soil of the desert support cactus and thorny bushes. Wet,marshy,deltaic soil supports mangroves. Question 4. What is an ecosystem?[CBSE 1997] Answer: The interdependence of species of plants and animals in a given area fdhns a single ecosystem. Question 5. Name two non-flowering plants. Answer: Ferns, algae and fungi. Question 6. Name, any two factors that form the flora and the fauna? Answer: Soil, relief, climate and drainage. Question 7. What is a biome? [CBSE 2014] Answer: A very large ecosystem on land having distinct types of vegetation and animal life is called a biome. Question 8. Mention any two regions having tropical evergreen forests. Answer: The Western Ghats, plains of West Bengal and Odisha, and the north-eastern India. Question 9. Name two commercially useful trees of the Tropical Rain Forests. Answer: Ebony, mahogany and rosewood. Question 10. Mention any two factors responsible for deforestation. Answer: Overgrazing by animals Careless management of forests Question 11. Where are the rhinoceros found?[CBSE 1995F] Answer: In swampy and marshy lands of Assam and North-West Bengal. . Question 12. The ‘Tropical Rain forests appear green all the year round.’ Give reason. [CBSE2014] Answer: There is no definite time for trees to shed their leaves. Question 13. Which are the most widespread forests of India? Answer: Tropical Deciduous Forests. Question 14. On the basis of the availability of water, tropical deciduous forests are divided into two parts. What are these two Categories? Answer: Dry deciduous and Moist deciduous. Question 15. Name one important trees each of the Moist Deciduous and Dry deciduous Forests. Answer: Moist Deciduous – Teak. Dry Deciduous – Sal. Question 16. Name any two useful trees of the Thorn Forests. Answer: Kikar, babul, khair and date palm. Question 17. Name any two trees of the Alpine Forests. Answer: Silver fir, pine and junipers. Question 18. How many species of birds and fish are known? Answer: Fish- About 2500 and Birds-Around 1200 Question 19. Where are the wild asses found in India? [CBSE 2000] Answer: In Rann of Kachchh (Gujarat) and Rajasthan. Question 20. Which is the natural habitatof (i) Indian lion (ii) Tigers Answer: (i) India lions -Gir forests of Gujarat, (ii) Tigers – Forests of Madhya Pradesh. Question 21. Explain with example how temperature can affect the type of . vegetation? Answer: On the slopes of the Himalayas, and hills of the Peninsula above, the height of 915m, the fall in the temperature affects the types of vegetation, and its growth and changes it from tropical to subtropical temperature in the alpine vegetation. Question 22. Name two areas where the thorn and the scrub forests are formed. Answer: Punjab plains, Northern Madhya Pradesh, South-West Uttar Pradesh, (Bundelkhand plateau). Question 23. Name any two biosphere reserves.[CBSE 1999] Answer: Nilgiri (Tamil Nadu, Kerala and Karnataka), Nanda Devi (Uttarakhand). Question 24. Name two endangered species of wildlife. [CBSE 1998] Answer: Tiger and rhinoceros. Question 25. How are the habitats of camels and those of one Horned rhinoceros diametrically opposite to each other? [CBSE 2000(C)] Answer: Camels are found in Rajasthan where as the one-homed rhinoceros are found in Assam and North-West Bengal. Question 26. Name any two states of India where elephants are found. Answer: Assam, Kerala and Karnataka. Question 27. Name any two biosphere reserves of India and their location. Answer: Manas – Assam Sundarbans – West Bengal Question 28. What is India’s rank in the world and in Asia in plant diversity? Answer: In the world – Tenth In Asia – Fourth. Question 29. Name any one medicinal plant. Answer: Neem Question 30. Why are the leaves of the Thorn forests small and stems succulent? Answer: Leaves of the Thom Forests are mostly small to minimise evaporation, and the stems are succulent to conserve water. Question 31. Where is the Alpine Vegetation found? Answer: At high altitudes, generally more than 3,600 metres above the sea-level.