NEET 2003 · Class 12

Evolution

Which one of the following describes correctly the homologous structures?

  1. (A)Organs with anatomical similarities, but performing different functions
  2. (B)Organs with anatomical dissimilarities, but performing same function
  3. (C)Organs that have no function now, but had an important function in ancestor
  4. (D)Organs appearing only in embryonic stage and disappearing later in the adult

The NCERT line that answers it

Verbatim line

Though these forelimbs perform different functions in these animals, they have similar anatomical structure – all of them have humerus, radius, ulna, carpals, metacarpals and phalanges in their forelimbs.

Chapter
Evolution
Section
6.3 WHAT ARE THE EVIDENCES FOR EVOLUTION?
Page
4
Words matched
37 of 37

The answer appears as a continuous sentence in NCERT. This is that sentence.

How this line gives the answer

0, emb=1.0, combined=1.0). Verified: high — The span explicitly states that the forelimbs have 'similar anatomical structure' but 'perform different functions', which directly matches the definition of homologous structures in option A.

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