The same bones, namely the radius, humour, and ulna, can be seen in the arms of bats, birds, and humans. A common pattern is the same between all representatives, but that has become converted and adapted for different functions. The most common examples are the limbs of animals. There are various examples of animals that have homologous structures.
For example, the embryo formed from all vertebrate animals resembles appearance. This close relationship is often seen because development patterns during embryology are similar among organisms with homologous structures. Organisms that share a common ancestor form this, which is called a monophyletic group, when they are classified based on phylogenetic relationships. This means that closely related species share homologous traits of a similar structure but may or may not have the same or different functions.
Homologous structures are the morphological features of organisms that evolved from a common ancestor.
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