Homologous structures/Analogous structures

[JustwantDDS]

Analogous - same function, diff origin

Homologous- same function, same origin
or can homologs have different functions???

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[flyingforever]

Analogous - same function, diff origin

Homologous- same function, same origin
or can homologs have different functions???

Analogous- same function, different origin.
Homologous- different function, same origin.

 

[Baylor2011]

Homologous structures CAN have the same function...the key is that they're from the same origin. Let's put this to rest once and for all people! lol

Analagous - same function, can look similar, different origin (convergent evolution) - results from the same environmental pressures being put on two unlike organisms

Homologous - can be same function or different function, looks similar, and are from the SAME origin - divergent evolution - results from different environmental pressures being put on two LIKE organisms

 

[Baylor2011]

http://www.rpdp.net/sciencetips_v2/images/L12D1_3.gif

Those are examples of homologous structures - notice they can have the same function. cats and humans use their carpals/metacarpals to grab things, as well as lizards and cats use them to walk as well.

Therefore putting the topic to rest...homologous structures CAN have the same function!!