Thursday, October 10, 2013
Animals with analogous structures from where you're from
What are 2 species of animals that display analogous structures from your country of origin? Explain the environmental conditions under which these structures evolved. Read at least one of your classmate's response and make a comment about it.
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Butterfly wings and bird wings are analogous structures. Both wings allow the organism to fly but their structures are slightly different. Bird wings, for example, have tiny bones, but butterfly wings are kept up by fluid pressure! This is due to the difference is size and durability between birds and butterflies. They have the same function but different forms and are therefore analogous.
ReplyDelete-Helen
It's interesting how birds and insects obtained these analogous structures; do you know how bats evolved to get wings since they are the only mammals with them?
DeleteI'm from an Asian descent and both hippos and Asian elephants have lower canine teeth that are similar in structure and function. These two animals are only very distantly related yet the lower canine teeth of both groups are similar in length and are curved. Both species use these structures to fight.
ReplyDeleteI find it interesting that these two animals, which appear so different on the outside, have these internal similarities. Also, it is interesting that they use these structures in similar ways.
DeleteAlso, I forgot to mention that hippos evolved in semiaquatic habitats while elephants evolved on grassy plains; hippos are more closely related to whales than to elephants. Both would've adapted these lower canine teeth to fend off predators such as lions, and also to fight each other.
ReplyDeleteI am from a German and Irish decent. A bat wing and a bird wing are actually analogous structures, because they are both used for flight but evolved differently. Bat wings are homologous to human forearms and other mammal forearms, but birds' wings evolved from a different ancestor. Using the bird wing again, the bird wing and the wing of a fly are analogous. They are both used to fly, but evolved completely different and are also structurally very different. Bats evolved from a common mammalian ancestor and eventually gained this ability to fly, presumably through mutations that created webbing between the "fingers" of the bats. Birds evolved from reptiles, which are a very separate part of the ancestral tree. Dinosaurs are thought to have had feathers, so this would be where the feathers come from on a bird.
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