The trout swam through water that was poluted by fertilizer. the fertilizer got to the water by being washed out by rain/ water given to the crops.
If you had a bucket of glacial sediments and a bucket of alluvial sediments, you would not be able to tell them apart. Its the environment that they are in, which is the distinguishing feature. Modern stream sediments are comprised of re-worked glacial sediments. <span>
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Blue and yellow because codominace shows both traits
With out genes we wouldn't look, talk, or have our own option's