1. The tailbone in a human and the tail of a monkey is an example of homology. The tailbone in humans is not used anymore but is still a part of our bone structure that has evolution over time. The vestigial is the remain of bones the tail would have been. On the other hand the monkey uses its tail bone as lineage and helps control the tail. The common ancestor of the humans and monkey is the ape.2. The butterfly and the bee have their wing to be an analogous traits These species use their wings in order to transport. However the butterlfly wings are much bigger and is a different of membranes and veins. Bee wings are smaller and made with chitin. The analogous trait is their wings it exhibits similarities between the species because
it allows them to fly as a matter of transportation. The ancestor of the butterlfy is the lepidopteran species. The ancestor of the bees come from the family Crabronidae.
Hi! Good job with your blog post. I never would of thought to compare our tailbone to a monkeys tail mostly because our tailbone isn't used. Your post is very informative especially the part about the difference between butterfly wings and bee wings. I compared bee wings to bird wings for my post.
ReplyDeleteI enjoyed this post. Especially, the homologous trait between humans and monkeys. I knew of our tail bone but only assumed it was called that because of the placement of the bone. I never knew it was a trait we share with monkeys and part of our evolution. Also interesting, was the way the human tailbone now curves in and the monkey's curves outward.
ReplyDeleteThank you for the interesting info!
I enjoyed this post. Especially, the homologous trait between humans and monkeys. I knew of our tail bone but only assumed it was called that because of the placement of the bone. I never knew it was a trait we share with monkeys and part of our evolution. Also interesting, was the way the human tailbone now curves in and the monkey's curves outward.
ReplyDeleteThank you for the interesting info!
Good choice of homologous traits, but let's clear up some misconceptions:
ReplyDeleteThe human tailbone is called 'vestigial' but it is not entirely functionless, serving as a muscle attachment for the muscles of our pelvic floor (very important for urinary and excretory functions) and also helps to stabilize us in the sitting position.
"On the other hand the monkey uses its tail bone as lineage"
What did you mean by "lineage"?
"The common ancestor of the humans and monkey is the ape."
Humans are apes and apes arose after the evolution of the two primary monkey lineages (Old World and New World). Apes arose from Old World Monkeys (like baboons) who have tend to have short tails. New World monkeys, who have the longer prehensile tails, are in a different evolutionary line, not leading to apes and humans. You would have to go back to very early primates to find the longer tails in the human lineage. That would be the common tailed ancestor of the human and longer-tailed monkeys I believe you are referring to.
Interesting choice of analogous traits. It is possible that they are analogous, but in order to confirm this, you need to know if the common ancestor possessed the trait and passed it on to these organisms. If it did, these traits are homologous because the traits were inherited through common descent. If the traits didn't arise through common descent but evolved independently from each other, than the traits are analogous. I suspect they arose independently, but not being an expert in insects, I don't have that specific information. Were you able to locate it?
"The analogous trait is their wings it exhibits similarities between the species because it allows them to fly as a matter of transportation."
This doesn't make the traits analogous. This could be explained by common descent as well. For example, the wings of hummingbirds and the wings of eagles are similar because they have similar functions but also because they both inherited the traits from a common avian ancestor. What we need to know to confirm analogy is that the traits evolved independently from each other, i.e., NOT from common descent.
This has been a question bugging me (no pun intended) for a while now, wondering how many times wings have evolved in insects. Apparently, it is likely that they evolved only once and all insect wings are homologous to each other. Given how different in structure bee and butterfly wings are, I find this very interesting but it also confirms that our eyes are not reliable in determining homology and analogy. We need the fossil record and the phylogeny to be sure.
A University of British Columbia article on this topic:
http://wiki.ubc.ca/Evolution_of_Insect_Wings
"Insect wings are hypothesized to have originated and evolved only once, sometime during the late Devonian, early Carboniferous periods."
Interesting that the best supported argument is that wings arose from evolved gill-like structures!
Great images.