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Evolution

Question
CBSEENBI12003192
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Which one of the following experiments suggests that simplest living organisms could not have originated spontaneously from non-living matter?

  • Microbes did not appear in stored meat

  • Larvae could appear in decaying organic matter

  • Microbes appeared from unsterilized organic matter

  • Meat was not spoiled, when heated and kept sealed in a vessel

Solution

D.

Meat was not spoiled, when heated and kept sealed in a vessel

Pasteur performed experiments in which he took sterilized (by boiling) yeast and sugar solution in a long necked, then he bent the neck of the flask like a neck of swan. After one month he observed that no life appeared in flask solution because the curved flask neck acts as a filter. He later on broken down the neck and observed the solution. He found that many micro-organisms were originated in solution.

Some More Questions From Evolution Chapter

Arrange the following substances in a proper sequence with regard to the formation of chemical constituents at the time of origin of life :

Sugar, methane, nucleic acid and amino acid.

What is the phenomenon called when the original drifted population becomes founders?

What are the two key concepts of Darwinian Theory of Evolution

What were the units of life according to the early Greek thinkers ?

Mention the type of nutrition in the cells originated first during the origin of life.

Which group of organisms were responsible for appearance of free oxygen in the atmosphere of the primitive earth ?

What is meant by the term fossil ?

What is the type of evolution in which the same structure developed along different directions due to adaptations to different needs ?

Name the different eras of geologic time scale.

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