BIOSYSTEMATICS or

TAXONOMY

Taxonomic Characters

Morphological

Similarities and differences in

shape, structure, color,

size, etc.

Anatomical

Anatomical similarities and

differences

Embryological

Similarities during the embryonic

development

Paleontological

Documentation of the evolution

of living organisms

through fossils

Molecular

Similarities based on genes

Biochemical

Different organisms have

different chemical

composition

Ecological-geographic

Organisms that occupy the

same area share a recent common ancestor

MorphologicalSimilarities and differences in shape, structure, color, size, etc.

AnatomicalAnatomical similarities and differences

EmbryologicalSimilarities during the embryonic development

PaleontologicalDocumentation of the evolution of living organisms through fossils

MolecularSimilarities based on genes

BiochemicalDifferent organisms have different chemical composition

Ecological-geographicOrganisms that occupy the same area share a recent common ancestor