SME
Grade 9 Science · Biology
Classification and the diversity of life: domains, kingdoms and cladograms
Read a cladogram: which traits each branch shares, which groups are clades, and which animals are most closely related.
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A sponge’s cells are not organized into tissues; every other animal here inherited tissues.
Assumptions
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A cladogram groups organisms by shared derived traits: new features passed on to every descendant.
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Branch order, not branch length, shows relationship; each branch point is a common ancestor.
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A clade is an ancestor and all of its descendants.
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