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What is the best explanation for Pasteur's results? A - HSC - SSCE Biology - Question 11 - 2022 - Paper 1

Question 11

What is the best explanation for Pasteur's results? A. Cells arise from existing cells B. Heating prevents broth spoiling C. Gases in the air cause broth to spoil

Worked Solution & Example Answer:What is the best explanation for Pasteur's results? A - HSC - SSCE Biology - Question 11 - 2022 - Paper 1

Step 1

A. Cells arise from existing cells

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Answer

This statement refers to the biological principle of biogenesis, which posits that living cells arise only from pre-existing cells. This principle was established through the experiments of Louis Pasteur, illustrating that cells are not spontaneously generated.

Step 2

B. Heating prevents broth spoiling

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Answer

While heating does indeed kill existing microorganisms, this option does not fully explain Pasteur's results, as it does not address the concept of spontaneous generation directly.

Step 3

C. Gases in the air cause broth to spoil

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Answer

This option suggests that contamination from the air could introduce microorganisms that spoil the broth. Pasteur's experiments showed that exposure to air, which contains microbial life, can lead to spoilage, supporting the notion that these microorganisms come from existing cells.

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