Evolution tree...phylogeny---simple question

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hmeworkuser
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Evolution tree...phylogeny---simple question

Post by hmeworkuser » Wed Jan 13, 2010 3:50 am

Hello i have been trying to write about phylogeny of following 4 organisms
Snail , Fish, pig and dinosaur.

Can someone help me what is the correct direction of evolution for these 4 organisms in phylogenetic tree of evolution? which came first and which came in end ..like that

Thanks in advance

hmeworkuser
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Post by hmeworkuser » Wed Jan 13, 2010 3:59 am

kindly help me

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Re: Evolution tree...phylogeny---simple question

Post by firechild » Wed Jan 13, 2010 4:02 am

The correct order of evolution is snail, fish, dinosaur, pig. Do you need any more information such as timing of different evolutionary points?

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Post by hmeworkuser » Wed Jan 13, 2010 4:08 am

Thanks .Yes can you provide some more information on evolutionary periods, etc?

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Post by Chroma » Wed Jan 13, 2010 5:50 am

[ snail [ Fish [ Dinosaur + Pig ]]]




If I recall correctly snails would have diverged from the other three close to the Cambrian period (~570 MYA, though likely before), and Dinosaurs arose in the Triassic (~250 MYA, sometime after) so fish would have to have diverged from the other chordates between 570 and 250 MYA... Pigs, being a modern mammal, would have come about sometime after the dinosaur extinction 65MYA... I'm sure someone else can give you a better answer (google/wikipedia is usually good) but this is a start...

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JackBean
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Re:

Post by JackBean » Wed Jan 13, 2010 9:05 am

hmeworkuser wrote:kindly help me

LOL, after 9 minutes? :lol:
http://www.biolib.cz/en/main/

Cis or trans? That's what matters.

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