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Difficulty: MediumEvidence for Evolution: Comparative Anatomy, Embryology, and Vestigial Organs

Analogous structures, such as the camera-type eye of an octopus and the eye of a mammal, share a common embryonic origin and basic structural arrangement inherited from a shared recent ancestor.

Answer: Answer

Answer

False. Analogous structures perform similar functions due to convergent evolution but do not share a common embryonic origin or ancestral structure.
The correct answer is False because analogous structures evolve independently to perform similar functions in response to similar environmental demands (convergent evolution), without sharing a common embryonic origin or recent ancestral structure.

Step-by-Step Solution

1
Define the biological concepts of homology and analogy in comparative anatomy.
Homologous structures share a common ancestry and embryonic development regardless of function, whereas analogous structures serve similar functions in different organisms due to environmental pressures but differ in embryonic origin.
Establishing accurate definitions is necessary to evaluate statements regarding evolutionary evidence.
2
Examine the specific anatomical structures presented (octopus eye vs. mammal eye).
Although both eyes perform the function of forming focused images, they develop from distinct embryonic layers (molluscan skin invagination vs. vertebrate neural tube outgrowth) and display key structural differences, such as the orientation of retinal photoreceptors.
Demonstrates that functional similarity in these organs is the result of convergent evolution rather than shared lineage.
3
Determine the truth value of the stem statement.
The statement incorrectly attributes shared embryonic origin and common ancestry to analogous structures.
Because analogous structures do not share a common embryonic origin or ancestral structure, the statement is false.

Key Concept

Distinction between homologous and analogous structures in comparative anatomy
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Topics

Evidence for Evolution: Comparative Anatomy, Embryology, and Vestigial Organs

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