In the early stages the embryos of four different species will look the same .For example, fish embryos and human embryos both have gill slits. In fish they develop into gills, but in humans they disappear before birth. That what makes them different.
The one that is typically associated with a large amount of organic material in a water supply is : C. Fecal Coliform
It's a type of bacterium that lived in aquatic supply. The presence of Fecal Coliform in an aquatic environment indicate that the environment is contaminated with mammals' fecal wastes
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Answer:
The answer is A.
Explanation:
Moth with dark wings under the tree with dark bark have a higher chance of surviving as its wings protect them from predator due to similar colour features.
They are formed into polymers.
