Which of the following cannot be explained by Lamarckism ?
Absence of lips in snakes
Long neck of giraffe
Degeneration of visual apparatus in cave dwellers
Dull progeny of noble laureate
'A brief reduction in size of a population, due to natural calamities, usually leads to random genetic drift'. For this statement, identify the correct example from the following.
Praying mantis is a good example of