Question: What material is the exoskeleton of the cockroach made of?
Options
A : Calcium
B : Chitin
C : Collagen
D : Cellulose
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Silver is extracted from which of the following ore?
________ is not use to make Portland Cement (PC).
CaO(s) + H2O -> Ca(OH)2 -where this chemical reaction occur?
Which of the following is not a metamorphic change?
Bituminous is a common type of _____________
In coated pits, the cytoplasmic surface is coated with:
Which of the following is a major constituent of DNA....
Which of the following metals does not react with hot....
Milk is the only source of __________ in nature.
Which of these are not deposited in the lumen of....
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