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This is a question of my last biology test:

Name at least one technological device that would have not been invented without scientific knowledge:
A.Radio
B.Ruler
C.Knife
D.None of the above

I answered D but got a cross for it. So can you please help me to solve what is the correct ans?

2 answers

Which one of those 4 requires technology to make it?

Sra
Radio uses technology
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