Both humans and bats have similar arm structures although they do look slightly different they both bend in similar ways and have five digits. The use of the arms are very different; humans use their arms to hold or move things while bats "arms" are part of their wings and help them fly. The common ancestor may have been a species that cold fly as well as use their arms for other things such as picking up food.
2. Analogous Trait
Sharks and dolphins both have similarly shaped bodies that help them swim quickly. Sharks use their agility to feed on pray while dolphins use their speed to avoid predators. Sharks and dolphins both had to learn to adapt to similar environments causing their body shape to be similar in form. The shapes of the bodies could have started with a long lost common ancestor but I believe that it is something that changed over time rather then just being passed down.
I never knew that bats had fingers, now i do. thanks. As for sharks and dolphins, i believe dolphins evolved from land animals, but converged upon a fish body form as a result for them to gradually adapt to their water environment. So, this makes dolphins a fish and not similar to shark.
ReplyDeleteI like the comparison between the human hand and the equivalent bat structure. Did the common ancestor of the two possess this same 5-digit structure?
ReplyDeleteGood comparison between the dolphin and the shark and their body shape. But if you have identified these as analogous traits, did both animals inherit this trait from the common ancestor?