AP BIOLOGY

Detailed explanation-1: -Flippers of whales and wings of birds considered as homologous organs because they both have the same anatomy, i.e., they have same skeletal structures, and they perform different functions. Flippers of whales are used to swim whereas the wings of birds are used for flight.

Detailed explanation-2: -When two or more organs or structures are basically similar to each other in construction but are modified to perform different functions, they are said to be serially homologous. An example of this is a bat’s wing and a whale’s flipper.

Detailed explanation-3: -A whale flipper and a bat wing are also homologous structures in the same sense as a human arm and cat arm with a humerus, radius and ulna, and so on.

Detailed explanation-4: -1: Homologous structures: Bat and bird wings are homologous structures, indicating that bats and birds share a common evolutionary past. Notice it is not simply a single bone, but rather a grouping of several bones arranged in a similar way.

Detailed explanation-5: -The arm of a human, the wing of a bird or a bat, the leg of a dog and the flipper of a dolphin or whale are homologous structures. They are different and have a different purpose, but they are similar and share common traits.