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Evolution — BIOLOGY STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 ScienceBIOLOGYEvolution3 Marks
Question
Write the difference between Darwinism and De Vries theory about evolution of life on earth.
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Answer

Differences between Darwinism and De Vries Theory :
DarwinismDe Vries Theory
1. According to Darwin, variations are small and directional.According to De Vries, mutation are directionless and random.
2. Small and gradual variations cause evolution.Sudden random and distinct variation called mutation causes evolution.
3. Evolution occured graduallyEvolution occurred all of sudden in single slip.

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