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There are two types of classification, homology and analogy. Homology is the fundamental identity of structure, as distinguished from analogy, which incidental resemblance in form or function. Bat wing showing homolog and analogy.

Bat Wing

There are two types of classification, homology and analogy. Homology is the fundamental identity of…

There are two types of classification, homology and analogy. Homology is the fundamental identity of structure, as distinguished from analogy, which incidental resemblance in form or function. Bird wing showing homolog and analogy

Bird Wing

There are two types of classification, homology and analogy. Homology is the fundamental identity of…

Homology of digits of odd toed mammals, showing gradual reduction in number and consolidation of bones. This figure displays a coney showing five digits.

Bones of Coney's Foot

Homology of digits of odd toed mammals, showing gradual reduction in number and consolidation of bones.…

Homology of digits of odd toed mammals, showing gradual reduction in number and consolidation of bones. This figure displays an elephant foot showing five digits.

Bones of Elephant's Foot

Homology of digits of odd toed mammals, showing gradual reduction in number and consolidation of bones.…

Homology of digits of odd toed mammals, showing gradual reduction in number and consolidation of bones. This figure displays a horse showing one digit.

Bones of Horse's Foot

Homology of digits of odd toed mammals, showing gradual reduction in number and consolidation of bones.…

Homology of digits of odd toed mammals, showing gradual reduction in number and consolidation of bones. This figure displays a rhinoceros showing three digits.

Bones of Rhonoceros' Foot

Homology of digits of odd toed mammals, showing gradual reduction in number and consolidation of bones.…

There are two types of classification, homology and analogy. Homology is the fundamental identity of structure, as distinguished from analogy, which incidental resemblance in form or function. Fly wing showing homolog and analogy.

Fly Wing

There are two types of classification, homology and analogy. Homology is the fundamental identity of…