#homologous organs

ZOOLOGY

Which structure in plants represents homologous organs?

Thorns of Bougainvillea and tendrils of Cucurbita are homologous structures derived from the same ancestral organ but adapted for different functions.

Ref: NCERT Biology Textbook - Latest Edition for Academic Session 2026-27 (Zoology section, Rationalized Textbook for Class XI and XII), Chapter: Biology - Zoology portion (Latest NCERT Textbooks for Academic Session 2026-27 - Rationalized Edition for Class XI and XII), Topic: Structural organization, physiology, human health and related concepts as per latest syllabus.

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Evidences of Evolution - Paleontological and Comparative Anatomy

Which structure in whales, bats, and humans is an example of homologous organs?

Forelimbs in whales, bats, and humans are homologous organs, indicating common ancestry despite different functions.

Ref: NCERT Class 12 Biology Chapter 6: Evolution Evidences of Evolution - Paleontological and Comparative Anatomy

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Evidences of Evolution - Paleontological and Comparative Anatomy

Which structure in plants represents homologous organs?

Thorns of Bougainvillea and tendrils of Cucurbita are homologous structures derived from the same ancestral organ but adapted for different functions.

Ref: NCERT Class 12 Biology Chapter 6: Evolution Evidences of Evolution - Paleontological and Comparative Anatomy

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Evidences of Evolution - Paleontological and Comparative Anatomy

Which of the following is NOT an example of homologous organs?

Wings of birds and insects are analogous, not homologous, as they have different structures but similar functions.

Ref: NCERT Class 12 Biology Chapter 6: Evolution Evidences of Evolution - Paleontological and Comparative Anatomy

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TYPE OF EVOLUTION

Homologous organs indicate:

Common ancestry reflects key principle in quiz on type of evolution+pyqs, where evolutionary mechanisms shape genetic variation and adaptation. In this context, Common ancestry aligns with experimental and theoretical evidence from population genetics, behavioral ecology and molecular phylogeny. Textbooks like Campbell Biology, Futuyma Evolution and Hartl Principles illustrate supporting data. Understanding why Common ancestry fits helps integrate natural selection, environment.

Ref: Futuyma, Evolution, Chapter 2: Homology, Convergence, Coevolution.

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