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Solution


Q.

In a species, the weight of newborn ranges from 2 to 5 kg. 97% of the newborn with an average weight between 3 to 3.3 kg survive whereas 99% of the infants born with weights from 2 to 2.5 or 4.5 to 5 kg die. Which type of selection process is taking place               [2019]
1 Cyclical selection  
2 Directional selection  
3 Stabilising selection  
4 Disruptive selection  

Ans.

(3)

Stabilising selection is a balancing type of natural selection which favours average sized individuals and eliminates extreme individuals.