11. Most of the mice population living in a forest clearing eat grass seed. Howe
ID: 273613 • Letter: 1
Question
11. Most of the mice population living in a forest clearing eat grass seed. However, a few mice climb the aquatic plants growing along a nearby creek and eat aquatic plant seeds, whereas a few larger mice forage for larger tree seeds in the forest.
A beaver dams the creek, which causes the forest clearing to flood. Over time, the proportion of mice that eat aquatic plant seeds, and a larger mice that eat forest tree seeds, increase in the population. Conversely, the proportion of mice that only eat grass seed decrease in the population.
What form of selection has taken place in this population?
A) frequency-dependent selection
B) directional selection
C) stabilizing selection
D) disruptive (diversifying) selection
Explanation / Answer
Ans:- Disruptive (diversifing) Selection.
Explaination:- this type of selection often times lead to sympatric speciation through a phyletic gradualism mode of evolution. it can be caused or influenced by multiple factors and also have multiple outcome. Individuals within the same environment can develop a preference for extremes of a trait, against the intermediate. selection occurs for accessing food . It is seen that often this is more prevalent in environments where there is not a wide clinal range of resources, causing heterozygote disadvantage or selection against the average.
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