Homologous and Analogous Structures Review

Define analogous structures and how they differ from homologous structures.

• Analogous structures and homologous structures are the same thing.

• Analogous structures have the same evolutionary origin, while homologous structures have different evolutionary origins.

• Analogous structures have different evolutionary origins, while homologous structures have the same evolutionary origin.

• Analogous structures are found in different species, while homologous structures are found in the same species.

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NGSS.MS-LS4-2

Compare and contrast homologous and analogous structures.

• Homologous structures are similar in structure and origin but may have different functions, while analogous structures have similar functions but different origins and structures.

• Homologous structures have different functions and origins, while analogous structures have similar functions and origins.

• Homologous structures have similar functions and origins, while analogous structures have different functions and structures.

• Homologous structures have different functions and structures, while analogous structures have similar functions and structures.

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NGSS.MS-LS4-2

What is the definition of homologous structures?

• Structures that are not found in different species

• Structures that serve the same function but have different origins

• Structures that are inherited from different ancestors

• Similar structures found in different species that are inherited from a common ancestor

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NGSS.MS-LS4-2

The diagram shows an image of a Pterosaur wing, bat wing, and bird wing. These are all different organisms, but share similar wing structures. If these structures are similar due to common ancestry, which of the following best describes them?

•  Vestigial Organ

•  Embryological Similarities

•  Homologous Structures

•  Analogous Structures

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NGSS.MS-LS4-2

Some organisms that share a common ancestor have features that have different functions, but similar structures.  These are known as

• vestigial structures

• analogous structures

• homologous structures

• fossil structures

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NGSS.MS-LS4-2

The forelimbs of mammals have similar anatomy because these groups descended from a recent common ancestor. Their bone structure is an example of a(n) (a)   structure.

• vestigial

• analogous

• homologous

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NGSS.MS-LS4-2

Explain the concept of homologous structures with an example.

• The forelimbs of vertebrates, such as the arms of humans, the wings of birds, and the flippers of whales, are examples of homologous structures.

• The fins of a fish and the legs of a frog are examples of homologous structures.

• The beak of a bird and the trunk of an elephant are examples of homologous structures.

• The wings of birds and the wings of insects are examples of homologous structures.

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NGSS.MS-LS4-2

Can you provide another example of homologous structures?

• The eyes of insects and the eyes of mammals

• The forelimbs of vertebrates such as humans, cats, whales, and bats.

• The flippers of whales and the fins of sharks

• The wings of birds and the wings of bats

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NGSS.MS-LS4-2

Provide another example of analogous structures.

• The wings of a bat and the wings of a bird.

• The fins of a fish and the flippers of a seal.

• The trunk of an elephant and the neck of a giraffe.

• The legs of a dog and the legs of a cat.

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NGSS.MS-LS4-2

Give an example of analogous structures.

• The wings of birds and insects

• The fins of a fish and the wings of a bird

• The roots of a plant and the legs of a dog

• The trunk of an elephant and the tail of a monkey

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