MCQ
The structural and functional unit of life called cell was discovered by:
- ARobert Boyle.
- BCharles Darwin.
- CRobert Koch.
- ✓Robert Hooke.
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Column $I$
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Column $II$
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| $(a)$ |
Electrically neutral particle
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$(i)$ |
Copper
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| $(b)$ |
The charges acquired by a glass rod rubbed with silk cloth
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$(ii)$ |
Neutron
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| $(c)$ |
Unlike charges
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$(iii)$ |
Positive
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| $(d)$ |
Lightning rod
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$(iv)$ |
Attract each other
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