Biology Forum Zoology Discussion horses and insects

last updated by mcar 17 years ago
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    • #541
      crawfsm
      Participant

      Which of these characteristics are shared by horses and insects:
      sexual reproduction
      endoskelton
      open circulatory sytem
      milk production

      where can I find this info?
      Thanks

    • #20573
      biostudent84
      Participant

      1. Yes: Horses and insects both reproduce sexually…horses through intercourse, and insects through egg production
      2. No: Horses have endoskeletons, and insects have exoskeletons
      3. Don’t think so: I know for a fact that horses have closed circulatory systems…but I can’t remember if insects do or don’t.
      4. No: Horses produce milk (a characteristic of a mammal). Insects, not being mammals do not produce milk.

      Side comment: There is an exception to the rule that only mammals make milk…there is a type of pigeon (if I remember correctly, it is the passenger pigeon) that is able to produce milk in its esophagus to feed its young.[/quote]

    • #20608
      MrMistery
      Participant

      Insects have open circulatory system, horses inclosed
      Side comment on kyle’s side comment: the stuff secreted by the pigeon’s esophagus(by the way, how is that part called in english) is described in all my zoology books as a milk-like product. It contains no cazein(milk’s protein) so it can not be considered milk
      Reagrds,
      Andrew

    • #20627
      biostudent84
      Participant

      Thanks for double-checking, Andrew =).

      As for the side comment…it has been noted as an “exception to the rule.” But even I don’t really agree with it. I just wanted to add it in so someone else doesn’t pop on and say “Hey, Kyle, look at this, you were wrong” 😉

    • #78565
      harrypotter101
      Participant

      Yes
      No
      No
      No
      Teehee, I’m waking this place up again. (It’s so much fun.)

    • #79043
      mcar
      Participant

      That again is homology and analogy, just review some of it.

      Though the two organsisms are guided by their instinct to reproduce. Pheromones or hormones subject them to reproductively become successful regardless of being sexual or asexual.–or else they’ll be extinct for the next 5 years.

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