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Homework Help: Grade 11 Biology EEI (similarities and differences)

  1. Jul 21, 2011 #1
    Hey there guys and girls,

    My name is Mark, I'm in a bit of a predicament here I have received an assignment in my grade 11 biology class which I am currently having some trouble with. Our task is as follows: This task examines the body plans of selected animal(both structure and function). Students need to grasp the notion that the design if an animal- it's shape, symmetry and internal organization- is a product of millions of years of evolution due to natural selection.

    My research question can be either:

    a) Analysing one attribute on multiple specimens of the same species and drawing conclusions about the attribute regarding the organisms survival.

    b) Studying analogous structures on diffrent species and highlighting the implications that your observations have toward each organsims way of life

    Okay so my problem is that I can't seem to find a research question, I am quite intrested in both the nervous and the circulatory systems. I was thinking of doing "How does the nostril size differ from the rabbit to the mouse in relation ot the habbitat they thrive in?" but there does not seem to be any prior research, or enough information online for me to answer this question.

    Another one I was thinking about was "How do rabbit teeth compare to the teeth of a mouse considering the animals diet?" But I encountered the same problem with this question there just is not enough information out there on this topic so after endless head scratching I have turned to you guys for suggestions? It can be any basic animal because we get to disect it so anything like a rat, mouse, toad, fish, crab, bird .. .. .. anything basic like that obviously not endangoured fish or birds or something like that, I'm sure you get the idea.

    Thank you
    PS any suggestion welcome!!!
    PPS Can't use any live animals they have to be dead :(
  2. jcsd
  3. Jul 21, 2011 #2
    So, I don't get this. If you're going to look this info up on the Internet, where does the dissection come in?

    I think you're mistaken about this. Maybe you just didn't know the right search terms. I googled "rodent comparative anatomy tooth". http://www.archive.org/details/manualofdentalan00tomerich" [Broken] was the top hit. OK, it was published in 1882, so maybe it's not the most up-to-date source, but how much change has there been in rabbit teeth in the last 130 years? And there were lots more.
    Last edited by a moderator: May 5, 2017
  4. Jul 21, 2011 #3
    Think... Rabbits have to chew on cellulose rich foods, rats are omnivores, opportunists... so their teeth structures are suited to that. Instead of searching Rabbit vs Rat teeth, perhaps you should look up differences in dental structure regarding omnivores and herbivores.
  5. Jul 22, 2011 #4
    Thank you guys so much! <3 This has really got me off in the right direction I'll do a bit more digging but there seems to be a tonne of information in regards to the dental thing . . . I also stumbled upon research regarding stomach to intestine ratio's in regards to herbivores and carnivores, there is a lot of really good information in regards to this topic . . . Let me know what you guys think about that :)

    In regards to the why we need the dissection if we are not doing original research, well . . . That’s a really good question :D I can't imagine how bad I am going to go at Uni if I'm already finding year 11 biology hard
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