Biology
Grade-9
Easy
Question
Select the statement that correctly explains the graph.
- There are a lot of average sized beaks in this population.
- Small beaks dominate this population
- Larger beaks dominate this population
- There are a large number of both small and large beaks but very few average sized beaks.
Hint:
The graph shows the disruptive selection and has larger and smaller breaks.
The correct answer is: There are a large number of both small and large beaks but very few average sized beaks.
- When an environment favors both extreme features, disruptive selection takes place.
- Since more than one phenotype, or physical attribute, is preferred by the disruptive selection, genetic and phenotypic diversity in a population rises.
- As a result, the diversified selection is another name for disruptive selection.
- Disruptive selection has the potential to trigger speciation over time.
- During speciation, a population becomes so diverse that it is impossible for them to reproduce sexually and give birth to viable children, splitting into two separate species.
- Disruptive selection is a powerful force in evolution because it increases the possibility of speciation, among other things.
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