Analogous structures in organisms are features in two different organisms, such as a cat and human in the photo, that are different species but function in a similar way. They do not come from a common ancestor, but they are used for similar things and have similar structure. The photo shows the arm of a human and the arm of a cat. They both have similar “finger” structure and bone structure. Not only do they look alike, but the function is pretty similar even though humans and cats do not have a common ancestor.