(D) ANSWER THE FOLLOWING QUESTIONS IN BRIEF--
1.QUESTION
Name the types of vegetation of the world.
ANSWER
The vegetation belts of the world can broadly be divided into various groups on the basis of their location and climatic conditions. These are Tropical Hardwood forests, Grass lands, Deserts and Temperature softwood forests.
2.QUESTION
Name some common plants found in cold and hot desert regions of the world.
ANSWER
Cactus, Shrubs , and bushes are the common vegetations of hot desert.
3.QUESTION
What are the major components of Ecosystem?
ANSWER
The major components of Ecosystem are-
Plants Kingdom, Animal Kingdom, human beings and atmosphere.
4.QUESTION
Give some examples of trees having needle shaped leaves.
ANSWER
The some examples of trees having needle shaped leaves are-
Pine, fin, spruce, larch etc.
5.QUESTION
Why do animals in the polar region have thick fur on their bodies?
ANSWER
In the polar region, the animals have thick fur on their body to protect them from the extreme cold.
(E) ANSWER THE FOLLOWING QUESTIONS--
1..QUESTION
Why are equatorial forests known as evergreen forests? Give a few examples of trees found there.
ANSWER
Equatorial forests are known as evergreen forests because these forests remain green through out the year. The trees are very tall. Main trees found in these areas are ebony, rubber, mahogany, rosewood, etc.
2.QUESTION
What role do plants play in ecological balance?
ANSWER
Plants play an important role in ecological balance. They use Co2 from atmosphere and release O2 during food making process. They provide food for herbivorous animals. They also provide shelter for a great variety of wildlife.
3.QUESTION
Distinguish between tropical and temperate grasslands.
ANSWER
Tropical Grassland
1. They are located between the equatorial forests and hot deserts in both the hemispheres.
2.The grasses of these regions are very rough, thick and tall.
3.These grasslands receive about 100 cm raifall.
4.Campos in Brazil are typical example of these forests.
Temperate Grassland
.1.They are located in the temperate zone and in the interior parts of the continents.
2.The grasses of these regions are short and soft.
3.These grasslands receive about 25 to 75 cm rainfall.
4. They are known by different names in different areas, for example- Prairies, Pampas, Downs, Veld.
4.QUESTION
Differentiate between hot and cold deserts.
ANSWER
Hot Deserts
1.These are mostly located on the western margins of the continents where temperature remain very high through out the year.
2.Some important hot desert of the world are the Sahara desert, the Thar desert, the Attacama.
3.Cactus,Shrubs and bushes are the common vegetations of this areas.
Cold Deserts
1.The cold deserts are mostly found around the polar regions where temperature remains below freezing point for the major part of the year.
2.The common vegetation is comprised of mosses, lichens, etc.
3.The main areas are northern part of Siberia and northern part of Canada.
5.QUESTION
What are the various problems related to the ecological imbalance? What steps should we take to solve them?
ANSWER
Ecological imbalance creates a numbers of problems like global warming, melting of glaciers, less amount of rainfall, habitat problem of wildlife etc.
The steps we should take to solve them as follows-
1.We should plant more and more trees.
2.We should plant use plant kingdom and other natural resources judiciously.
3.We should stop hunting of animals.
4.We should use CNG.
5.Water waste from factories must be treated in water treatment plant.
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