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Evolution

Question
CBSEENBI12002241
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Select the wrong statement:

  • the viroids were discovered by D.J. Ivanowski

  • W.M. Stanley showed that viruses could be crystallized

  • The term 'contagium vivum fluidum' was conined by M.W. Beijerinek

  • Mosaic disease in tobacco and AIDS in human being are caused by viruses

Solution

A.

the viroids were discovered by D.J. Ivanowski

All statements are correct except the statement (a), which can be corrected as Viroids were discovered by TO Diener in 1971 as a new infectious agent that was smaller than virus.

Some More Questions From Evolution Chapter

Give another name for origin of life from non living matter.

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 ?

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