Subject :NSO Class : Class 6
Subject :NSO Class : Class 8
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Subject :NSO Class : Class 7
Ans 4:
Class : Class 8
Senseless question, wrong question and totally different solution. I am disappointed as there are many mistakes.
Ans 7:
Class : Class 8
Firstly, the image itself is totally different from that of the options. None of the options actually fit the image. So, either there should be a "None of these" option or there should be a different image in which at least one option fits. I ask SOF to kindly make the needed changes.
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Subject :NSO Class : Class 6
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Subject :NSO Class : Class 4
Ans 4:
Class : Class 4
plants can release carbon dioxide at night only tulsi plant does not release carbon dioxide
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Subject :NSO Class : Class 7
Ans 1:
Class : Class 8
This is a trick question.. It says 'produced', not 'obtained'.. The larvae produce the silk fibre, then it is obtained from cocoon..
Ans 3:
Class : Class 10
really confusing ... the answer option d is correct in the sense that produces means extracting the silk or when it is ready to extracted by humans.
but option c is correct when produces means that when larva , itself after the fourth moult stage produces silk.
Ans 4:
Class : Class 7
ans:c,you may think d,but only in larval stage it produce silk in option d it is in a cocoon stage it cannot produce silk
Ans 8:
Class : Class 8
answer is c because in the pupa stage the silk is already produced and in the larvae stage it produces silk when it is ready to go in the next stage of its life
Ans 9:
Class : Class 8
No, the answer is 'C' only. In pupa stage the silk fiber is only obtained, but actually it is produced by larva and in question it is asked which stage produces fiber. Hence, the answer is 'C".
Ans 10:
Ans 11:
Class : Class 9
Answer should be C ,as only larvae in the life cycle of moth produce silk fibres , pupa or cocoon does NOT make silk fibres . They only undergo change in stage IN the silk fibres. They do not have the ability to produce silk fibres !
Ans 12:
Class : Class 8
The answer is C as at that time of a Silkworms life it will produce silk. With that silk they will make a cacoon and then they will become a Moth. While it is a Pupa it does not have the ability to make Silk hence the answer is C
Ans 13:
Class : Class 7
the answer is d only in the cocoon stage they are heated in the hot water so that the reproducing caterpillar will die and it will be very easy to extract silk fiber from it.
Ans 15:
Class : Class 7
IT IS 'D' BECAUSE AT COCOON STAGE THE CATERPILLAR PRODUCES SILK FIBRES AND KNOTS AROUND IT AND COVERS HIMSELF.AFTER SOME TIME THE SILK FIBRES GETS HARDEN DUE TO THE GUMMY SUBSTANCE WHICH THE CATERPILLAR PRODUCES............IT IS CALLED "FIBROIN" WHICH IS MADE UP OF PROTEINS.ON HEATING THE COCOONS IN WATER THE SILK AGAIN BECOMES SOFT AND IS EXTRACTED FROM COCOONS........THIS PROCESS IS CALLED "REELING OF SILK"
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Subject :NSO Class : Class 6
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Subject :NSO Class : Class 8
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Subject :NSO Class : Class 3
and 
, then 
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Subject :NSO Class : Class 4
Ans 3:
Class : Class 5
Answer will be A). It is because, humus is found on topsoil and not in deep layers of soil.
Ans 7:
Class : Class 4
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