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CTET Paper II (Mathematics and Science) 6 Jan 2022 Solved Paper

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Question : 89 of 150

Marks: +1, -0

Read the following paragraph.

"In 1929, Alexander Fleming was working on a culture of disease-causing bacteria. Suddenly, he found the spores of a little green mould in one of his culture plates. He noticed that the presence of this mould prevented the growth of bacteria. In fact, it also killed many of these bacteria. From this mould, penicillin was prepared."

Which of the following understanding(s) about the development of scientific knowledge is conveyed in this paragraph?

A. Science proceeds systematically according to pre-determined steps.

B. Science requires careful observation

Only A
Only B
A & B
Neither A nor B

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