Organisms that survive a new environment are said to have adapted to their surroundings.
David.
Hail does form during thunderstorms and when it is below freezing temperatures in the atmosphere. Hail is a super-cooled water vapor and freezes once it comes into contact with the atmosphere.
The most common circumference to be expected in this situation is 2 cm.
Since it is given that the original population of oak trees contains acorns with the most common circumference of 2 cm, thus, the same circumference will be favored after 15 generations of stabilizing selection.
Stabilizing selection occurs when natural selection results in stabilization i.e. large number of individuals attain mean or average value for a particular trait. In this process, phenotypes of medium-sized individuals are favored through natural selection.
Since it is already mentioned that the mean circumference is 2 cm in the original population thus the same value will be expected after 15 generations of stabilizing selection.
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