1. For your homologus traits provide the following information (25 pts):
a. Briefly describe the two different species that possess the homologus trait. (5 pts)
The two different species that possess the same homologus trait are humans and gorillas.
b. Describe the homologus trait of each species, focusing on the differences in structure and function of the trait. Why do these homologus traits exhibit differences between the two species? Make sure your explanation is clear and complete. (10 pts)
The homologus traits are the four limbs (arms and legs), with no tail, that both humans and gorillas have. They are distinct because humans walk on only two of the limbs, the legs, and gorillas walk on all four.
c. Who was (generally, not specifically) the common ancestor of these two species and how do you know that ancestor possessed this homologus trait?
(5 pts)
The common ancestor who possessed this trait were the hominids, or great apes.
d. Provide an image of each species in this comparison. (5 pts)
2. For your analogous traits provide the following information (25 pts):
a. Briefly describe the two different species that possess the analogous trait. (5 pts)
The two different species that possess a homologus trait are birds and bumble bees.
b. Describe the analogous trait of each species, focusing on the similarities in structure and function of the trait. Clearly explain why these analogous traits exhibit similarities between the two species. (10 pts)
The analogous trait that both of these species share are their wings. These species do not really have a similar structure other than that they both possess a heart, eyes and wings. The most clearly defined analogous trait that they both possess are their wings, which they use to fly.
c. All pairs of organisms share some common ancestor if you go back far enough in time. Did the common ancestor of these two species possess this analogous trait? Why or why not? (5 pts)
d. Provide an image of each species in this comparison. (5 pts)
Your post was very interesting, Daryl. I especially liked the images of your analogous species - extremely detailed and specific which clearly points out the obvious - both can fly but completely different.
ReplyDeleteI enjoyed your post, what i found most interesting was the homologous trait between gorillas and humans. They share significant similarities yet are still different like you said human walk with two limbs while gorillas use all four to walk.Also the analogous traits between the birds and bumble bees, their only similarities are their wings. Good post!
ReplyDeleteI feel like I know a lot of people who walk like gorillas, but it was really interesting to read all the info. One of the things I like about the blogging thing is that you can learn a bunch of stuff but you don't really have to do a lot of work. I definitely enjoyed your post, it was really well written.
ReplyDeleteGood comparison between the behavioral/structural differences between the human and gorilla. I like the skeletal images. Regarding the common ancestor, you didn't really identify a common ancestor, just a grouping that humans and gorillas belong to. (And gorillas are not hominids.) Your book discusses these possible ancestors in other chapters.
ReplyDeleteI like the analogous comparison between bees and birds, but it was hard to find a common ancestor, wasn't it? You have to look back as far as perhaps 600 MYA (pre-Cambrian) to find one before chordates arose.