Homologous :
a). Two of the homologous traits thats I believe are the same would be Rabbits and Frogs. Frogs and rabbits share similar bones in their bodies just like the rabbits such as humerus,radius and ulna. Although they both have different sets of bones they are both homologous.
b). The homologous traits of each of these species that they have in common would be forelimbs. Having forelimbs allow frogs and rabbits to do certain things in order to survive such as swimming, jumping and landing. Rabbits on the other hand need it for balance and hopping.
c ). The common ancestor of these two species would be a group of dinosaurs names is theropods
Analogous:
a). Two of the Analogous that I have chosen were parrots and butterflies. Parrot wing bones are very small but butterfly wings are completely different because their wings are rigid by fluid pressure. They might have some similarities but they are build with different structures which make them analogous.
b). Both the butterflies and parrots have some similarities in structure and traits for example both the are able to fly and need this specific trait in order to survive. Both the butterfly and the parrots use their wings as a way to avoid predators if encountered they have the ability to go away.
c). Butterfly and parrots do not come from the same ancestor for many reasons but one specific reason would be because both of these animals don't have similar types of wings the butterfly for example comes from a family where their wings are tissue substances and parrots have different materials it makes them completely different in that aspect.
Very interesting post. It's crazy how frogs and rabbits both share similar traits. I was completely clueless on the fact that they both share the same common ancestor. As for you analogous trait, I think you did an amazing job. You clearly described and gave reason as for why they do not share a common ancestor. Great pictures by the way.
ReplyDeleteHey Stephanie, great examples for both your homologous analogous traits. The rabbit and frog comparison was a great example of how two very similar bone structures in very different animals can relate back to each other. I chose to do the giant whale and giraffe for my comparison and was surprised how similar some of their bone structures are.
ReplyDeleteSome of your images didn't load. This isn't really a problem since so many did, but check to see if you can figure out why some didn't.
ReplyDeleteTo be clear, the rabbit and frog are organisms that possess the possible homologous traits, correct? They aren't the traits themselves.
You've described the different function of the forelimbs for the frog and the rabbit, but how are these different functions reflected in the different structures of the rabbit and frog bones of the forelimb? If you were to hold up a humerus from one of these two organisms, how would you tell which one it belonged to?
With regard to ancestry, you would actually have to go back farther than dinosaurs to find the common ancestor. Frogs are amphibians so the common ancestor of the frog and rabbit would be an archaic amphibian that gave rise to later amphibians (like the frog) reptiles, birds and mammals (including the rabbit). We know from fossil evidence that early amphibians possessed the ancestral tetrapod limb structure, which it passed on by common descent to its descendants, including the frog and the rabbit. This is what we need to know to confirm that these traits are indeed homologs.
Okay on your analogous pairing description and the explanation for the difference of function and structure. Don't hesitate to expand your explanations more fully to ensure your reader better understands the whole story. Don't make any assumptions on their prior knowledge.
Actually, as explained in the guidelines, ALL organisms share a common ancestor if you go back far enough in time. I'm not a specialist in insect evolution, but I do know that the common ancestor between butterflies and birds existed 100's of millions of years ago. It may well have possessed the insect wings and then passed that trait onto the butterfly. Does that mean these traits are homologous? Well, we do know quite a bit about the evolution of bird wings. Wings in birds evolved during their split with reptiles, long, long after the split with that common insect ancestor. That confirms that this trait of wings arose independently in birds, even if it didn't in butterflies, and this is sufficient to confirm analogous status.