1. A.
Coyotes (Canis latrans) are brownish-grey members of the Canidae family. They
are sometimes called brush wolves or prairie wolves because of their resemblance
to their larger relatives. Foxes are another member of the Canidae family. They
come in different colors, depending on their habitat. Arctic foxes, for instance,
are white during the winter and more grey-brown during other seasons. Foxes are
similar to cats in many ways even though they are in the same family as dogs.
B. Both the coyote and the fox have claws
that are meant more for traction when running or digging to uncover food or
create a den. (Unlike cats, who use their claws more as a weapon.)
C. The common ancestor of
the fox and the coyote is in the Canidae family, which unilaterally has claws.
D.
2. A.
Honeybees (Apis mellifera) are invertebrates that live in colonies. Hawks are
large birds of prey that hunt rodents, lizards and snakes.
B. Honeybees have wings that allow
them to travel from their hives to the flowers that provide their food. Hawks
also have wings, but have very little genetic similarity to bees. However, they
have wings for similar reasons; so that they can eat. They use their effective
eyesight to soar in the sky and spot their prey.
C. The common ancestor between these
two most likely did not have wings, since hawks trace back their lineage to
reptiles. While honeybees and hawks are both in the Animalia kingdom, their similarities
do not continue past that.
D. 
Good post! I really learned a lot. I really liked how you described the similarity in the appearance of the claws, but their different uses in different species. Cats use them as weapons while coyotes use them for digging and traction. This statement I thought was very interesting and really catches the definition of homogeneity really well. It was a great example. Good Job!
ReplyDeleteAwesome choice of species the fox and the coyote do look alike so I would think they do share a similar trait. Great to know that these species come in multiple colors I wasn't aware of this. Interesting that you chose to put the eagle and the honey bee as you selection of species. Great examples given for functions of their wings and also the differences between both species. Even thought the eagle seems so different from the honeybee its interesting to know they share something in common.
ReplyDeletehi!
ReplyDeletei loved reading about your information! i learned so much, by learning about the claws, i would have definitely had thought that coyote and fox claws would be used for weapons since they are out in the wild, it does make alot more sense now learning that they are used for surviving and for digging, great info! i enjoyed reading about hawks and bees wings as well, that their wings are most importantly for the use of survival as well and for food, awesoome. good job!
You don't indicate which traits are homologous and which are analogous? I figured it out, but don't leave people guessing.
ReplyDeleteGood introductory description of your homologous pairing.
For the discussion of your homologous traits, the guidelines asked that you focus on the differences in the structures and explain those differences in terms of the differences in environmental pressures. You explain the similarities but don't explain any differences. Assuming they share a common genetic origin, this only indicates that these are shared genetic traits, not homologs. How do the claws of these two species differ? Can that difference be explained as a function of their environmental differences?
You do note that cats use their claws differently, and remember that they are also functionally different, since they can be retracted. Perhaps a better comparison would have been between a coyote and a wild cat of sorts, such as a bobcat or a cougar?
Can't argue with the common ancestry as you are correct that they both part of the Canis family, but again, we are looking for differences, not similarities.
Good images.
Okay on your description of your analogous species.
I agree that the wings of bees and hawks share no genetic similarities, but how do their structures compare (note that the guidelines ask that you discuss this from a structural perspective)? How are bird wings built compared to bee wings?
On the right track for ancestry, but finish the story. It is difficult to know if the common ancestor of these two species had wings, but we don't actually need to know that to confirm that these are analogs. We know that, as you say, birds evolved from reptiles and *developed their wing structure during or after this split* (note the emphasis there... that is what was needed to finish the story). Because of that, we know that wings evolved independently in birds, which is all we need to know to confirm their analogous status.
Good images.
Do you have some html/js/css in your post? (The title bar on the right shows an html comment that looks added.) If so, that's awesome. I'm a computer science major, and would like to see your code you put in the post, if you did.
ReplyDeleteI'm afraid I'm not sure! I'm okay with computers but I'm certainly not a compute science major haha. My computer did tell me something about how the images I used might cause problems for certain people's browsers, but other than that I don't know!
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