Category:Primitive groove

Media in category "Primitive groove"

The following 3 files are in this category, out of 3 total.

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  Aves Dorsal view of a twenty-five-hour chick embryo with seven primitive segments.jpg 1,993 × 1,744; 2.21 MB
  
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  Aves egg in the first hours of incubation.jpg 965 × 480; 316 KB
  
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  The Biological bulletin (20187079648).jpg 1,854 × 2,206; 1.25 MB