class 9 social science mcq
25 When you see the structure of the cell through compound microscope, which of the following is unseen
1. cell wall
2. cytoplasm
3. nucleus
4. electron
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24 This disease also affects human along with cattle
1. foot & mouth disease
2. anthrax
3. malaria
4. viral disease
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23 In pasteurisation milk is heated up to
1. 50C
2. 60C
3. 70C
4. 80C
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22 Invention of pasteurisation
1. edward jenner
2. louis pasteur
3. flemming
4. ronald ross
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