Feathers may have started as simple filaments in ancient dinosaurs, but a team of Swiss researchers is digging deep into the ...

All vertebrate embryos follow a common developmental path due to their common ancestry. All have a set of very similar genes (the homeobox genes) that define their basic body plan. As they grow ...

While the common ancestor of vertebrates with synovial joints is still a mystery, the oldest specimen with evidence of these ...

Can a single protein-encoding gene determine whether a vertebrate embryo develops normally? Yes, according to Osaka Metropolitan University researchers, who found that suppression of Pcdh8 is ...

A comparative study of vertebrate embryological development focusing on the morphological development (e.g., Differentiation of tissues, organs, and systems) of vertebrates. Evolutionary relationships ...

Development is the process by which a fertilized egg, or embryo, generates the cells, tissues, and organs of a new individual and assembles them into their proper form. Evolution produces the body ...

Almost all vertebrate embryos exhibit 6 aortic arches. Ancestral condition (shown in some vertebrate embryos) may have more. In gill breathing fishes, the aortic arches are retained and provide ...

Scientists have officially grown a notochord—the tissues that act as the “GPS for the developing embryo” by guiding the formation of the spine and nervous system. Previous attempts to create ...

The zebrafish is a good research stand-in for its fellow vertebrate, the human ... the fish’s advantages is clear—literally. Because embryos are transparent and develop outside the mother ...

Naked embryos, however, stayed smooth ... some scientists think that placodes arose in the earliest vertebrates—a “remarkable conservatism,” argues Université Grenoble Alpes biologist ...

The PHS Policy covers all live vertebrate animals. If an embryo hasn't hatched yet, or an early-larval-stage fish hasn't used up its yolk sac yet, is it not still a vertebrate animal? My facility ...

Jawed vertebrates known as gnathostomes appear to be the first ... When the team paralyzed the skate embryos, they discovered that where there's no movement, there's no joint cavity. This aligns with ...