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Metameric

metameric

1. (Science: chemistry) Having the same elements united in the same proportion by weight, and with the same molecular weight, but possessing a different structure and different properties; as, methyl ether and ethyl alcohol are metameric compounds. See isomeric.

The existence of metameric compounds is due to the different arrangement of the same constituents in the molecule.

2. (Science: biology) Of or pertaining to a metamere or its formation; as, metameric segmentation.

Origin: Pref. Meta- _ Gr. Part.


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What type of creature is this?

seein the picture and the segments on the body and the flagella i think it has metameric segmentation and hence may belong to phylum annelida(may be a larval state) or platuhelminthes.....not sure...probably since the picture doesnt reveal full details....

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by rg
Thu May 04, 2006 7:15 pm
 
Forum: Zoology Discussion
Topic: What type of creature is this?
Replies: 25
Views: 10382

Metameric segmentation

Metameric segmentation means serial repetativ position of body parts. It can be complete when all body parts/systems are repeated in every segment (like in Annelids or in Platodes; nervous, vascular, excretory, gonads, digestiv, ...

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by Beetle
Wed Nov 02, 2005 11:18 pm
 
Forum: General Discussion
Topic: Metameric segmentation
Replies: 7
Views: 19263

Metameric segmentation

... "first" to exhibit a form of segmentation, even though, in their case, it doesn't make much difference since all their segments are similar (ie. metameric). This segmentation then developed even further in the Arthropods to the point that the animal has a head, abdomen and thorax, each of which ...

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by zenith_beth
Wed Nov 02, 2005 7:33 pm
 
Forum: General Discussion
Topic: Metameric segmentation
Replies: 7
Views: 19263

Metameric segmentation

Are the segments in Annelids the same or related to the segments in Arthropods? I don't know if that is the difference in "metameric segmentation" and other segmentation. The way I learned it Arthropods like insects, spiders, crustations all are made of segments that have been modifed ...

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by February Beetle
Wed Nov 02, 2005 12:05 am
 
Forum: General Discussion
Topic: Metameric segmentation
Replies: 7
Views: 19263

Metameric segmentation

Annelid worms eg. earthworms, exhibit metameric segmentation. Their bodies are made up of segments, and the segments are similar to each other - that is metameric segmentation. What i cannot understand is what exactly is its evolutionary significance!!!

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by zenith_beth
Tue Nov 01, 2005 3:27 pm
 
Forum: General Discussion
Topic: Metameric segmentation
Replies: 7
Views: 19263
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