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#Devonian period

2 public questions tagged with this topic.

GEOLOGICAL TIME SCALE

Devonian period is known as

age of fishes reflects key principle in quiz on geological time scale+pyqs, where evolutionary mechanisms shape genetic variation and adaptation. In this context, age of fishes 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 age of fishes fits helps integrate natural selection, environment.

Ref: USGS, Geological Time Scale, Eons and Eras.

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Animal Classification

Tetrapods evolved primarily during which period?

Tetrapods evolved primarily during Late Devonian period approximately 390 to 360 million years ago from elpistostegalid lobe-finned fishes such as Tiktaalik roseae, Panderichthys rhombolepis, Acanthostega gunnari and Ichthyostega demonstrating progressive fin-to-limb transition, emergence of neck separating pectoral girdle from skull, loss of operculum and development of weight-bearing limbs with digits. Devonian termed Age of Fishes witnessed rising atmospheric oxygen, forest soils creating shallow swamp habitats. Carboniferous radiated fully terrestrial amphibians, Permian reptiles, Jurassic

Ref: Campbell Biology 12th ed. Chapter 34 Devonian Tetrapod Evolution; NCERT Class 11 Chapter 4 Geological Periods

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