A) Directional selection
B) Stabilising selection
C) Disruptive selection
D) Cyclical selection
Correct Answer: B
Solution :
Stabilising selection is a type of natural selection in which the population mean stabilises on a particular non-extreme trait value. This is thought to be the most common mechanism of action for natural selection because most traits do not appear to change drastically over time. The result of stabilising is the over-representation in a specific trait. For example, human birth weight, the number of eggs a bird lays, and the density of cactus spines. The given data shows stabilising selection as most of the newborn having average weight between 3 to 3.3 kg survive and babies with less and more weight have low survival rate.
You need to login to perform this action.
You will be redirected in
3 sec
