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if shown a tree! 40. Can you recognize mono- para- and poly-phyletic groups How have oxygen levels varied over time, and what
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J-k Mono p hylati ulatic Taxon Para plai auteb

In the phylogenetic tree we can analyse monophyletic, polyphyletic and paraphylatic groups by observing the tree. Relation between anscestoral and descendent species are considered for analysis of these 3 conditions.

Monophyletic: when one ancestor and all of its descendent are considered for the grouping of taxa we call them monophyletic.

Mono - means one

Polyphyletic: group of organisms or species which are derived from more then one common evolutionary anscestor or anscentoral group. They are not assumed to place in same group.

Paraphylatic groups: Descendent with its one most common anscestoral group are known as paraphylatic groups. But they do not involve all of the descendants.

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