Their differences may eventually stop the separated squirrels from breeding with one another this is an example of

Their differences may eventually stop the separated squirrels from breeding with one another this is an example of  an Allopatric speciation

Explanation:

In allopatric speciation, species from the same population evolve some different characters due to the differences in geographical locations.

In this scenario, the species become reproductively isolated and diverge.

The mating times of the squirrel have changed due to the environmental changes.

They no longer interbreed and hence no viable offspring thus sexually isolated from each other.

the sugar-phosphate backbone forms the structural framework of nucleic acids, including dna and rna. this backbone is composed of alternating sugar and phosphate groups, and defines directionality of the molecule.

explanation:

the universal gravitation equation. since the gravitational force is directly proportional to the mass of both interacting objects, more massive objects will attract each other with a greater gravitational force. if the mass of one of the objects is doubled, then the force of gravity between them is doubled.