When two groups of organisms independently evolve similar adaptations, it’s called convergent evolution. Sharks and whales both have streamlined bodies and tail flukes. How do we know that these similarities are because of convergent evolution? Hint: Whales are tetrapods. Are sharks?
Answers
Answer: Many species have similar traits because they are descendants of a single common ancestor. These species developed from a single source and are related to a certain degree despite their current differences. These traits they share are known as homologous structures. Homologous structures are similar in structure and function because they originated from the same ancestor long ago.
Species may also have similar traits even though they are not related to each other. This usually results because the species live in similar environments and fill similar ecological roles. The structures in this case are known as analogous structures. The process that brings these traits forward is called convergent evolution. Convergent evolution is natural selection that favors the same type of structure in different ancestors. The similarity between convergent evolution-affected species is called homoplasy, which literally means 'from the same mold or form.'
The word "tetrapod" means "four feet" and includes all species alive today that have four .... the marshes, streams, and temporary ponds of that day, along with freshwater sharks. ... Some, like the whales, made the transition back into the water.so this similarities is only because of convergent evolution.