Millions of years ago, there were tropical forests across much of North America. Hyracotherium was the earliest known ancestor of the horse that was believed to have lived in the tropical forests. The fossil of Hyracotherium was about the size of a modern dog. In contrast to the large grinding teeth of the modern horse, the fossil of Hyracotherium had small teeth. Based on this information about Hyracotherium, which of the following is most likely true?

a polymer is a chainlike molecule made up of small molecular units. these small molecular units are called monomers. monomers of polymer can be joined together either naturally or synthetically.  

solvent

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evidence and logical support is essential for a scientist to do in order to maintain credibility. this is because no one can believe without any logic and without any evidence.hence a scientist can maintain credibility by proving himself and by answering logically so experiments prove very beneficial. logical hypothesis give conclusion which is acceptable. therefore, there are two main factors to maintain credibility by a scientist is evidence and logical support.