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.
- The sandy soil of the desert support cactus and thorny bushes.
- 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.
- Overgrazing by animals
- 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.