Help me..In these MCQ'S.
. #No spam..

1)Biodiversity of an area refers to the vast number of species of plants, animals and microorganisms existing in that  area.

2)Fauna refers to animals, whereas flora refers to plants

3)Yes, I agree with the statement. Forests provide plant cover to check the flow of water. If forests are removed, then  floods will occur.

4)False.

Endangered animals are those species whose numbers are diminishing at an alarming rate and face an immediate  danger of extinction.

5)If all trees in a forest are cut, it will lead to erosion of soil.

6)Grazing by cattle should be controlled for forest conservation.

7)True.

Soil erosion is the removal of top layer of soil that is most fertile. If not checked, soil erosion ultimately leads to  desertification.

8)The flora and fauna of a country are among the most important renewable natural resources.

9)Dinosaurs are extinct because no living member of this species is present on earth.

10)Wildlife conservation and forest conservation are closely related.

11)False.

A biosphere reserve comprises of three core areas: natural zone, buffer zone and transition zone. These zones are  not present in a tiger reserve.

Explanation:

Peace

desert perennials often survive by remaining dormant during dry periods of the year, then springing to life when water becomes available. most annual desert plants germinate only after heavy seasonal rain, then complete their reproductive cycle very quickly.