NCERT 9th Class (CBSE) Social Science: Natural Vegetation and Wild Life 

Question: 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: What is flora and fauna?

Answer: Flora: Plants of a particular region or period.
Fauna: The species of animals.

Question: “Land and soil affects the natural vegetation directly and indirectly”. Justify by giving two examples.

Answer:

1. The sandy soil of the desert support cactus and thorny bushes.
2. Wet, marshy, deltaic soil supports mangroves.

Question: What is an ecosystem?

Answer: An ecosystem includes all of the living things (plants, animals and organisms) in a given area, interacting with each other, and also with their non-living environments (weather, earth, sun, soil, climate, atmosphere). Ecosystems are the foundations of the Biosphere and they determine the health of the entire earth system.

Question: Name two non-flowering plants.

Answer: Ferns, algae and fungi.

Question: Name any two factors that form the flora and the fauna?

Answer: Soil, relief, climate and drainage.

Question: What is a biome?

Answer: A very large ecosystem on land having distinct types of vegetation and animal life is called a biome.

Question: Mention any two regions having tropical evergreen forests.

Answer: The Western Ghats, plains of West Bengal and Odisha, and the north-eastern India.

Question: Name two commercially useful trees of the Tropical Rain Forests.

Answer: Ebony, mahogany and rosewood.

Question: Mention any two factors responsible for deforestation.

Answer:

1. Overgrazing by animals
2. Careless management of forests

Question: Where are the rhinoceros found?

Answer: In swampy and marshy lands of Assam and North-West Bengal.

Question: The ‘Tropical Rain forests appear green all the year round’. Give reason.

Answer: There is no definite time for trees to shed their leaves.

Question: Which are the most widespread forests of India?

Answer: Tropical Deciduous Forests.

Question: 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: Name one important trees each of the Moist Deciduous and Dry deciduous Forests.

Answer: Moist Deciduous – Teak.
Dry Deciduous – Sal.

Question: Name any two useful trees of the Thorn Forests.

Answer: Kikar, babul, khair and date palm.

Question: Mention any two values which are reflected by the ecosystem?

Answer: Importance of interdependent and interrelationship.

Question: How do the human beings influence the ecology of a region?

Answer: The greed of human beings leads to over utilization of these resources. They cut the trees and kill the animals creating ecological imbalance.