Homologous bones in a dolphin's flipper, a bird's wing, and a dog's leg share a common structural framework despite their different functions. These bones, such as the humerus, radius, and ulna, demonstrate a similar arrangement and composition, reflecting their evolutionary origins from a common ancestor. This similarity illustrates how diverse species adapt their skeletal structures to suit various environments and modes of locomotion, while maintaining fundamental anatomical features.
They do not have the mammalian neocortex, but they have homologous structures that function in a similar manner.
Homologous structures are structures that indicate a related evolutionary ancestry, not just similarity. For example, the flipper of a whale, the wing of a bird, and the arm of a a human are similar in their bone structure. Analogous structures are structures that are similar in appearance and function but are not the result of shared ancestry. For example, the wings of a birds and insects have the same function, but they do not reflect a shared ancestry.
Birds and bats are homoplasious because they are similar, but not derived from a common ancestor. An example of homologous structures is a man's arm and a cow's foreleg. They are anatomically similar but have different functions.
Homologous organs have similar embryonic origin and basic structure whereas Analogous organs have different embryonic origin and basic structure. Homologous organs may look different and may perform different function; e.g., forelimb of a man and flipper of a whale. Whereas Analogous organs look alike and perform same functions; e.g., Wings of birds and insects.
Yes. They have similar structures but not necscarily the same function
A structure with similar shape but a different use
You can call them wings, but they're more similar to a flipper. They certainly don't have wings in the same sense that flying birds do. Here's a diagram, which labels them as "flipper-like wings" http://www.enchantedlearning.com/subjects/birds/label/empenguin/answers.GIF
A bird's wings are homologous to a human's arms. Both structures share a similar basic skeletal pattern despite their different functions. This indicates a common evolutionary ancestry between birds and humans.
Yes they are. I disagree. Even if they ultimately come from a common ancestor, in order to classify two characteristics as homologous, they have to have some similarities. After millions of years of being in the oceans, the fins of whales have evolved such that they are not at all similar to cats' legs.
Homologous structures are features with a similar anatomical origin but have different functions, indicating common ancestry, such as the limbs of vertebrates. Analogous structures have similar functions but different anatomical origins, suggesting they evolved independently due to similar environmental pressures, like the wings of birds and insects.
Dolphins are mammals.
The wings of birds and bees are an example of analogous features, as they have evolved independently in each group and do not share a common ancestry that possessed wings. Homologous features are those that are inherited from a common ancestor and are usually more similar in structure.