Question

Which of the following pairs is least likely to represent homologous structures?Select one:a. The wing of a bat and the arm of a humanb. Mitochondria of a fish cell and mitochondria of an ant cellc. The legs of a bird and the legs of an insectd. Hemoglobin of a baboon and hemoglobin of a gorilla

Answer 1

Answer:

The correct answer is c. The legs of a bird and the legs of an insect

Explanation:

The structures that are driven from a common ancestor are called homologous structures. They can look different superficially but they are related developmentally. Homologous structures are formed by divergent evolution for example forelimbs of bat and humans are homologous structures.

So it does not mean that homologous structures of two different animals perform the same function. So here the pair which is least likely to share the homologous structure is the legs of a bird and the legs of an insect because it is not derived from same common ancestor and does not show homology.

Answer 2

The legs of a bird and the legs of an insect are least likely to represent homo-logous structures (Option c).

• Homo-logous structures are structures that exhibit a common evolutionary origin.

• Homo-logous structures are always derived from a common ancestor.

• Conversely, analogous structures don't have a common origin and they exhibit the same function.

In conclusion, the legs of a bird and the legs of an insect are least likely to represent homo-logous structures (Option c).

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