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Dictionary » P » Phylum

Phylum

Definition

noun, plural: phyla or phylums

(1) A taxonomic rank at the level below Kingdom and above Class in biological classification, especially of animals.

(2) A group of Classes with similar distinctive characteristics.


Supplement

Examples: Class Mammalia (mammals), Class Aves (birds) and Class Ascidiacea (sea squirts) all belong to Chordate Phylum, which is a group of animals that have notochords at some time in their life cycle. Aside from Chordata, other well known phyla are the Mollusca, Porifera, Cnidaria, Platyhelminthes, Nematoda, Annelida, Arthropoda and Echinodermata, which all belong to Kingdom Animalia.


Word origin: New Latin ph[ymacr]lum, from Greek phūlon, class.

Compare: division.
See also: taxonomy.


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Please check my work?

... there are two possible right answers. The second one is a. The third question makes no sense, since they do lack "a" but that's not a phylum characteristic. Your answer is probably what they want, though. On the last one, don't ignore the word "adult."

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by Darby
Sun Jun 17, 2012 1:03 am
 
Forum: General Discussion
Topic: Please check my work?
Replies: 1
Views: 1325

Tapeworms questions

If this is about Ascaris (and even the early questions probably are), you're not even in the right phylum.

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by Darby
Mon May 21, 2012 12:35 am
 
Forum: Zoology Discussion
Topic: Tapeworms questions
Replies: 2
Views: 826

Re: Clade v. Phylum

Thank you so much! that is really helpful :) MIranda

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by naturalgoats
Mon Mar 26, 2012 11:34 am
 
Forum: Evolution
Topic: Clade v. Phylum
Replies: 6
Views: 2834

Re: Clade v. Phylum

In the followink link: http://commons.wikimedia.org/wiki/File:Phylogenetic-Groups.svg.png you can see that: - Reptiles are a paraphiletic group since it excludes birds, which are known to have evolved from archosaurs (the order of reptiles to which crocodiles and dinosaurs be...

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by marquitosgm
Mon Mar 26, 2012 7:45 am
 
Forum: Evolution
Topic: Clade v. Phylum
Replies: 6
Views: 2834

Re: Clade v. Phylum

A clade is a branch of the evolutionary tree comprising all the organisms that have evolved from one same common ancestral population. This is a monophylletic group. Taxa and clades are not the same. Taxonomist make groups of organism (taxa) that share common traits. These traits can be morphollogic...

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by marquitosgm
Mon Mar 26, 2012 7:22 am
 
Forum: Evolution
Topic: Clade v. Phylum
Replies: 6
Views: 2834
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