Ahuman forearm, horse’s front leg, bat’s wing, and porpoise’s flipper have similar bone structure. what conclusions can we draw from the similarities in bone structure between these mammals?

1. since each limb is used for different functions, these species must be unrelated evolutionarily.
2. since each limb has a different shape, these species must be related evolutionarily.
3. since each limb shares the same type of bone structure but performs different functions, these structures are the product of adaptive evolution.
4. since each limb shares the same type of bone structure but performs different functions, these species cannot possibly be related evolutionarily.

3. Since each limb shares the same type of bone structure but performs different functions, these structures are the product of adaptive evolution.

Explanation:

Homologous structure can be an organ or bone with similar anatomical features found in different animals. This similar anatomical features found in different animals can serve as an evidence of evolution, though this anatomical features or structures may appear similar, they may not function the same.

A. These limbs are homologous structure

Explanation: It is because the bone has the same structure but different type of limbs because it can be different type of species...  so yes hope that was very helpful I got it right on my test so yeah