|
What percentage of the solar energy is trapped and utilised by the plants?
|
|
1
|
2422
|
September 26, 2016
|
|
Write two characteristic features of energy flow in an ecosystem
|
|
0
|
3480
|
September 26, 2016
|
|
Write two methods to reduce die use of pesticides
|
|
0
|
821
|
September 26, 2016
|
|
Define a food web. State its significance for ecosystem
|
|
0
|
7255
|
September 26, 2016
|
|
In the following food chain, grass provides 4000J of energy to the grasshopper
|
|
1
|
6468
|
September 26, 2016
|
|
What will happen if all the snakes are killed?
|
|
0
|
3653
|
September 26, 2016
|
|
Write the harmful effects of using plastic bags, on the environment
|
|
1
|
997
|
September 26, 2016
|
|
Write any two differences between biodegradable and non-biodegradable substances
|
|
1
|
6753
|
September 26, 2016
|
|
State two methods to get ride of non- biodegradable wastes
|
|
0
|
423
|
September 26, 2016
|