They look very similar and they're both used for swimming, so we could say, "Hey, maybe they are very related "to each other." And similarly, if you look at the wings of the bat, let me use a different color, wings of a bat, and the wings of, say, an eagle, again, both are used for flying, they look kind of similar, we might say they are related to each other. For the dolphins we don't call them as fins, we call them as flippers. Animals completely different from each share the same similarities for different functions.- In these pictures, we might look at the fin of the shark, and say they are very similar to the flippers of a dolphin.
The more closely the organisms are related, the more similar the homologous structures between organisms.The common ancestry of the species can be seen in the structure and development of homologous structures, even if their function is different.These similarities between these structures are evidence that life on Earth has a common ancestor that the present species have evolved from over time. Although they are used differently, the basic skeletal structure is the same.The forelimbs of humans and bats are homologous structures.May not perform the same function but they share a common ancestral origin.Structures derived from a common ancestor or same evolutionary or developmental origin.Homologous Structures Erica, Nao, Christian and Justine
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