Populations of mosquitofish have diverged from each other in environments that are different, based on the presence/absence of a predator. Is this an example of allopatry or sympatry?

This is an example of sympatry.      

Explanation:

Sympatry: Refers to two similar species that coincide in part or their whole distribution area. There are two ways in which two species can reach sympatry.

Allopatry: Refers to the case in which two species are completely separated from each other, with no overlapping. This separation is due to the emergence of a barrier that separated the original species, and after that, the two populations evolved separately in different new species.

In the exposed example there is no barrier, but the presence/absence of a predator might be acting as an environmental pressure of the populations´ microhabitats that leads to divergence.

carbohydrates: (starches and sugars) composed of carbon, hydrogen, and oxygen.

lipids: (fats, oils, and waxes) are made of carbon and hydrogen atoms.

nucleic acids: contain hydrogen, oxygen, nitrogen, carbon, and phosphorus. they are polymers of nucleotides. a nucleotide has three parts, a 5-carbon sugar, a phosphate     (-po⬇️4) group, and a nitrogenous base.

proteins: made up of nitrogen, carbon, hydrogen, and oxygen. they are polymers of amino acids.

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