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Adaptations of the dog
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Origins
Ages ago before dogs there were wild wolves which were hostile towards people and other thing besides their own species. Our human ancestors then took wolf puppies, then these puppies were trained for serving humans needs.
Changes of the wolves disposition
The wolves that we had been using for our own uses had lost their aggression towards humans and were companions and assistants.
The old and the new
Adaptations of the dog
The ancestral wolves were more independent and were a lot more predatory. The modern dog has now lost it's need to hunt any more and is more affectionate. The wolves are more solitary and isolated in places like the forest. Dogs are more social and like being around people.
environmental effect
Environmental effects affected their adaptation by changing some characteristics for certain dogs by natural selection.
Impending evolution
Evolution timeline
A present environmental problem are droughts, dogs mights have to evolve for the shortage of water. The dog population might have to evolve for the shortage of water by changing to have to consume less water.
Over time dogs went through a lot of changes through evolution and natural and selective breeding. At first there were wild wolves that we used as assistants. Finally, there were and are dogs that are now our companion and are friendlier with a lot of variety.