Groups Of similar organisms within a species are called

From smallest to largest, the levels are species, genus, family, order, class, phylum, and kingdom. Each of the ranking levels is called a taxon. Just as a genus is a group of similar species, a family is a group of similar genera. An order is a group of similar families.

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phylogenetic tree is the tree of life or evolution tree. it shows the different branches of evolution. the sequence goes like tissues - coelom - backbone - endoskeleton - segmentation

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b. sucking