iv.
v.
What are the main respiratory organs in cockroaches?
What is the formula of rust?
Name the following -: (5 marks)
i.
ii.
ii.
A pigment due to which the color of blood becomes red
A device which is used to amplify the sound of heart.
The reproductive part of the plant
The scientist who discovered the magnetic effects.
Any two neutral substances.
iv.
v.
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Explanation:ygyfgdcdrdxdzxdfxxresfzrf
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