horses and insects

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crawfsm
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horses and insects

Post by crawfsm » Thu Mar 17, 2005 1:39 am

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

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biostudent84
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Post by biostudent84 » Thu Mar 17, 2005 2:54 am

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]

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MrMistery
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Post by MrMistery » Thu Mar 17, 2005 6:22 pm

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
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biostudent84
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Post by biostudent84 » Fri Mar 18, 2005 1:05 am

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" ;)

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harrypotter101
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Post by harrypotter101 » Tue Nov 27, 2007 2:33 pm

Yes
No
No
No
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Post by mcar » Thu Dec 06, 2007 2:28 pm

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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