Biology for ( Grade 10 )

B.O.D. It shows the deficiency of oxygen in the water. Daphnia is the indicator of B.O.D. 15.5 OZONE LAYER DEPLETION : Between ...

succeeded in forging an agreement to freeze CFC production at 1986 levels., Nitrous oxide: is produced in industrial processes, ...

15.6 (b)Pollution of the Ganga: The Ganga runs its course of over 2500 km from Gangotri in the Himalayas to Ganga Sagar in the B ...

15.7 SUSTAINABLE DEVELOPMENT : It is the development which can be maintained for a long time without undue damage to the environ ...

Harvesting of rain helps in the conservation of groundwater. Composting of solid organic waste for biogas and manure. 15.10 WI ...

(i) They depend on forest produce, for various aspects of their life. (ii)The local people need large quantities of firewood, sm ...

15.11 (b) Forest Department of the Government : (i) Which owns the land and controls the forest resources. (ii)People develop pr ...

Nomadic shepherd drove their flock every summer in this area. 15.12 (c) Causes of Damages to Forests : (i) Local people damage ...

(E) By 1983, the Asabari forest showed a remarkable recovery. (iii) Economic growth and Ecological conservation : (A) Forest res ...

(ii) Failure to sustain underground water due to loss of vegetative cover, development of water demanding crop and pollution fro ...

Irrigation Control of flood which either stops or slows the amount of water in the river. Criticism about large dams : Social ...

Khadins, tanks and nadis in Rajasthan. Bandharas and tals in Maharashtra Ahars and Pynes in Bihar Kulhs in Himanchal Pradesh Po ...

waste. (E) Traditional water harvesting system : The water harvesting structures are mainly crescent shaped. Monsoon rains fill ...

the earth. 15.14 (a) Non-Renewable Energy Sources : These are energy sources which cannot be replaced easily when the get exhaus ...

government where each one has significant role in Management of Natural Resources. 15.14 (d) Necessity of Judicious Use of Coal ...

DAILY PRACTIVE PROBLEMS # 15 OBJECTIVE QUESTIONS Ecosystem term was coined by (A) Odum (B) Mishra (C) Reiter (D) Tansley Pyra ...

planted (B) some quick growing annuals should be planted if a tree must be cut for other uses (C) tree must be curt whenever nec ...

SUBJECTIVE QUESTIONS SHORT ANSWER TYPE QUESTIONS How is ozone formed in the stratosphere? What is the function of ozone layer? ...

ORIGIN AND ECOLUTION OF LIFE 16.1 INTRODUCTION : All living organisms have arisen through the evolutionary process and show dive ...

reproduction, both because of errors in DNA copying and as a result of sexual reproduction. Variations in a population –inherite ...