★ Must-know
📌 Homologous organs have different forms but a similar structural plan and body position because they derive from a common ancestor, whereas analogous organs share a function without necessarily sharing morphology or ancestry.
Further detail
The wings of insects and the wings of birds are analogous because they perform flight but do not necessarily share the same anatomical origin.
Haeckel presented an evolutionary theory of homology in 1866, and Darwin discussed it in 1872. — Heckel
Homology links shared ancestry, whereas analogy links shared function.
1. What distinguishes homologous organs from analogous organs?
2. Why are insect wings and bird wings classified as analogous organs?
3. Which description best defines an organ?
What defines homologous organs in biology?
They have different forms but a similar structural plan and body position from a common ancestor.
What characterizes analogous organs?
They share a function without necessarily sharing morphology or ancestry.
Why are insect and bird wings considered analogous?
Because they perform flight but do not share the same anatomical origin.
Who presented an evolutionary theory of homology in 1866?
Haeckel presented it in 1866.
Who discussed the evolutionary theory of homology in 1872?
Darwin discussed it in 1872.
What defines an organ in the body?
A distinct body part with specific structure, shape, position, and function.
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