Natural Vegetation and Wild Life

Exercise

1. Answer the following questions.
(i) Which are the two factors on which the growth of vegetation mostly depends?
Answer: The growth of vegetation depends on temperature and moisture.
(ii) Which are the three broad categories of natural vegetation?
Answer: Natural vegetation is divided into three categories:

1. Forests- where rainfall and temperature are plentiful for plant growth
2. Grasslands- plants that grow in regions of moderate rainfall
3. Shrubs- plants that grow in dry regions

(iii) Name the two hardwood trees commonly found in tropical evergreen forest.
Answer: Two hardwood trees commonly found in tropical evergreen forests are rosewood and mahogany.
(iv) In which part of the world are tropical deciduous forests found?
Answer: Tropical deciduous forests, also known as the monsoon forests are found in regions that experience seasonal changes. These areas include India, northern Australia and America.
(v) In which climatic conditions are citrus fruits cultivated?
Answer: Citrus fruits are grown in regions marked for hot, dry summers and mild rainy winters. These citrus fruits include oranges, figs, olives and grapes.
(vi) Mention the uses of coniferous forest.
Answer: The softwood evergreen trees that grow in the coniferous forests are used for making matchboxes and packing boxes. They are also used for making pulp, which is used to manufacture paper and newsprint.
(vii) In which part of the world is seasonal grassland found?
Answer: Seasonal grasslands can be found in the mid latitudinal zone and in the interior parts of the continent.
2. Tick the correct answer.
(i) Mosses and Lichens are found in:
(a) Desert Vegetation
(b) Tropical evergreen forest
(c) Tundra vegetation
Answer: (c) Tundra vegetation
(ii) Thorny bushes are found in:
(a) Hot and humid tropical climate
(b) Hot and dry desert climate
(c) Cold polar climate
Answer: (b) Hot and dry desert climate
(iii) In tropical evergreen forest, one of the common animals is:
(a) Monkey
(b) Giraffe
(c) Camel
Answer: (a) Monkey
(iv) One important variety of coniferous forest is:
(a) Rosewood
(b) Pine
(c) Teak
Answer: (b) Pine
(v) Steppe grassland is found in
(a) S. Africa
(b) Australia
(c) Central Asia
Answer: (c) Central Asia
3. Match the following.

Column A	Column B
(i) Walrus	(a) Soft wood tree
(ii) Cedar	(b) An animal of tropical deciduous forest
(iii) Olives	(c) A polar animal
(iv) Elephants	(d) Temperate grassland in Australia
(v) Campos	(e) Thorny shrubs
(vi) Downs	(f) A citrus fruit
	(g) Tropical grassland of Brazil

Answer.

Column A	Column B
(i) Walrus	(c) A polar animal
(ii) Cedar	(a) Soft wood tree
(iii) Olivers	(f) A citrus fruit
(iv) Elephanta	(b) An animal of tropical deciduous forest
(v) Campos	(g) Tropical grassland of Brazil
(vi) Downs	(d) Temprate grassland in Australia

  

4. Give reasons.
(i) The animals in polar region have thick fur and thick skin.
Answer: Animals in the polar region have thick fur and skin, so as to protect themselves from the cold climatic conditions. This region has limited natural vegetation due to its cold climate.
(ii) Tropical deciduous trees shed their leaves in the dry season.
Answer: Tropical deciduous forests are found in large parts of India, Northern part of Australia and America. Such areas experience seasonal changes and hence the tropical deciduous trees shed their leaves in the dry season to save water.
(iii) The type and thickness of vegetation changes from place to place.
Answer: The type and thickness of vegetation changes from place to place, because of the change in climatic condition, landform, temperature and moisture. Different types of plants and animals can survive in different types of vegetation.