Question

Answer the following


1.Why do we find a variety of vegetation around us? On which factors growth of vegetation mostly depends?

2. Why are giraffes mostly found in tropical grasslands but not in the temperate one?

3. Why do Xerophytes have long,strong roots,thorny surfaces and wax coated leaves?

4. How human activities are disturbing the balance of natural vegetation and wildlife?

5.What will happen if all green cover of earth disappears and there will be no wild life at all ?

Answer 1

Answer:

1. (a) The two factors on which the growth of vegetation mostly depends are— temperature and moisture. (b) The three broad categories of natural vegetation are—forests, grasslands and shrubs.
2. Tropical grasslands or savannas; Temperate grasslands ... Savannas are always found in warm or hot climates where the annual rainfall is from about ... Savannas that are caused by soil conditions and that are not entirely maintained ... of species competing for living space, usually only one or a few kinds of grass are more ...
3. Xerophytes such as cacti are capable of withstanding extended periods of dry conditions as they have deep-spreading roots and capacity to store water. The leaves are waxy and thorny that prevents loss of water and moisture. Even their fleshy stems can store water.
4. Overfishing and hunting, the destruction of habitats through agriculture and urban sprawl, the use of pesticides and herbicides, and the release of other toxic compounds into the environment have all taken their toll, particularly on vertebrates.
5. If all the green plants disappear from the earth, then all the organisms (herbivores, carnivores and omnivores) will die due to starvation as green plants are the source of food for all organisms.

Explanation:

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Answer 2

Explanation:

Photosynthesis takes in the carbon dioxide produced by all breathing organisms and reintroduces oxygen into the atmosphere. ( Image credit: KPG_Payless | Shutterstock) Photosynthesis is the process used by plants, algae and certain bacteria to harness energy from sunlight and turn it into chemical energy.