Diffrentiate between homologous and analogous organ?

Answer 1

Homologus structures have the same function and evolved along the same pathway- example- all mammals have hair that evolved from one common ancestor. Hair in mammals is a homologus structure.

Analogous Structures have the same function but evolved diffrently. Birds and butterflies both fly with wings, but the birds and insects didn't evovle wings from the same common ancestor.

Answer 2

Homology: a likeness in structure between parts of different organisms due to evolutionary differentiation from the same or a corresponding part of a remote ancestor. Homologous structures and organs have helped to create phylogenetic trees revealing organismal relationships over evolutionary time (ex. forelimb of mammals)

Analogous: Similar in function but not in structure and evolutionary origin; these can be obvious separations which do not have any connection between establishment of organismal relations (ex. wings in birds and bats). However, there are other forms of analogous structures and forms which have initially misled biologists and experts in building phylogenies (flying squirrels and Australian sugar gliders body structure).

Answer 3

Homology: a likeness in structure between parts of different organisms due to evolutionary differentiation from the same or a corresponding part of a remote ancestor. Homologous structures and organs have helped to create phylogenetic trees revealing organismal relationships over evolutionary time (ex. forelimb of mammals)

Analogous: Similar in function but not in structure and evolutionary origin; these can be obvious separations which do not have any connection between establishment of organismal relations (ex. wings in birds and bats). However, there are other forms of analogous structures and forms which have initially misled biologists and experts in building phylogenies (flying squirrels and Australian sugar gliders body structure).

Answer 4

A homologous organ is an organ that is similar due to shared common ancestry e.g. the pentadactyl limb of a mammal.
An analogous organ is onee that is similar due to convergent evolution e.g. the wing of a bird and an insect.

Answer 5

homologous organs arise from the same ANCESTRAL origin or embryological-genetic-developmental origin.....ie. forefin or fore arm of sharks, fish, amphibians, reptiles, birds, mammals, (inc dolphin flipper and our arm) are homologous (same basic bones and bone names in all these vertebrates arise from the "same embryological tissue-sight in the differentiating embryonic tissues)

analogous organs have similar functions, but are not of the same genetic embrylogical or ancestral organ (not homologous)...wing of bird is analygous to wing of butterfly...both are to fly, but they are NOT from the same embryological histology changes.

So homologous organs are & can be analogous, but not all analogous organs are homologous