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Subject :NSO    Class : Class 4

A scientist observed a sudden increase in the number of algae in a lake over a few days. The reason behind it could be that ____________.

A Water cycle in the area got unbalanced
B Electronic wastes were being dumped in a nearby area
C A factory with heavy smoke discharge has been established nearby
D Heavy amount of chemical fertilisers were being used in a nearby field


dddddddddddddddddddddddddddddddddddddddd is the ans

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Subject :NSO    Class : Class 8

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Subject :NSO    Class : Class 4

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Subject :NSO    Class : Class 3

Ans 1:

Class : Class 3
C

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Subject :NSO    Class : Class 7

Which of the following is the most effective way to measure the effect of different carbon dioxide concentrations on the rate of photosynthesis?

APlacing same amount of dry ice in similar bell jars kept in sunlight containing different plants.
BUsing different concentrations of sodium hydrogen carbonate solution with same type of immersed water plants in similar bell jars placed in sunlight.
CVarying light intensity given to different well watered plants placed in similar bell jars kept in sunlight.
DVarying amount of air provided to different well watered plants placed in similar bell jars kept in sunlight.


Ans 1:

Class : Class 8

Ans 2:

Class : Class 7

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Subject :NSO    Class : Class 3

Ans 1:

Class : Class 3
A

Ans 2:

Class : Class 4
The correct is A

Ans 3:

Class : Class 3
yes comp

Ans 4:

Class : Class 3
Yes Ananya

Ans 5:

Class : Class 4
A is correct

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Subject :NSO    Class : Class 4

Ans 1:

Class : Class 4
for a fellow like u the ans should be b eat and check...

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Subject :NSO    Class : Class 4

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Subject :NSO    Class : Class 3

Ans 1:

Class : Class 3
B is the correct answer.

Ans 2:

Class : Class 3
B

Ans 3:

Class : Class 1

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Subject :NSO    Class : Class 3

Ans 1:

Class : Class 3
D

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