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What causes speciation according to Huge...

What causes speciation according to Huge De Vries?

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Hugo De Vries in 1901 proposed that new species arise from the preexisting ones in a single generation by sudden appearance of marked variation called mutations.
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OSWAAL PUBLICATION-EVOLUTION-TOPIC :2 EVOLUIONARY THEORIES .ITS MECHANISM AND EVOLUTION OF MAN( VERY SHORT ANSWER TYPE TYPE QUESTIONS )
  1. By what latin name the first human-like being, the homonid was known?

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  2. When we say "survival of the fittest", does it mean that (a) Those whi...

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  3. Give a 3-word definition of "organic evolution".

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  4. Name the naturalist who had also come to similar conclusion around the...

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  5. What causes speciation according to Huge De Vries?

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  6. Which is the earliest fossil of prehistoric man?

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  7. Name the common ancestor of great apes and man.

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  8. In what respect did Darwin agree with Lamarck?

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  9. Name the theory of evolution given by Lamarck.

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  10. Give the three key factors of the modern concept of evolution.

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  11. In which areas does the dark melanic species of the peppered mouth abo...

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  12. Which period is called the 'age of reptiles'?

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  13. Mention the immediate ancestors of birds and mammals.

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  14. Name three recent eras of geological time.

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  15. Cite one example of dinosaurs.

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  16. In which era the fossils are scanty.

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  17. What is the probable period of origin of cyanobacteria?

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  18. Mention the key concepts about the mechanism of biological evolution/S...

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  19. According to Hardy-Weinberg's principle, the allele frequency of a pop...

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  20. Pick out the ancestral line of Angiosperms from the list given below- ...

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