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Question:

Variations caused by mutation, as proposed by Hugo de Vries are:

Random and directional

Random and directionless

Small and directional

Small and directionless

Solution:

Correct option is B. Random and directionless. According to Hugo de Vries, mutations are random and directionless. De Vries believed mutations caused speciation and hence called saltation (single step large mutation). So, the correct answer is 'Random and directionless'