Start to replicate I think
The change in water quality in Flint Michigan is caused by the city officials deciding to stop fully treating the water to save, i.e., option B.
<h3>What is Flint Michigan?</h3>
Flint is the populus city in and the county seat of Genesee County, Michigan, in the United States. It is a metropolitan city in the Mid Michigan region, located along the Flint River 66 miles northwest of Detroit.
The change in water quality in Flint Michigan is caused by the city officials deciding to stop fully treating the water to save.
Thus, the correct option is B.
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Directional selection increases the frequency of individuals expressing one of the extreme phenotypic traits in a population. At some time in history, directional selection led to the Warbler-finches evolution.
<h3>
What is Directional Selection?</h3>
Directional selection is one of the different types of natural selection.
It increases in the proportion of individuals with an extreme phenotypic trait.
It causes a decrease in the number of individuals expressing intermediate phenotype, and the other extreme phenotype.
This selection presents more frequently in those cases in which interactions between living organisms and the environment modify in the same direction.
In the exposed example,
- All finches vary from 10 to 20 cm, but Warbler-finches is closer to 10 cm (one of the phenotypic extremes).
- All finches vary from 8 to 38 g, but Warbler-finches is closer to 8g (one of the phenotypic extremes).
So, from the whole range, Warbler-finches only express one of the extreme traits, meaning that the species has suffered from the directional selection.
These traits probably increased the animals' fitness, and hence, they were favored by natural selection.
You will learn more about directional selection at
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I believe the CORRECT answer is (A) (if i am wrong please forgive me) (A seems the most logical answer)
Its called the Electric current <span />