Question

what evidence supports the hypothesis that the chicken and tortoise are more related than the tortoise and fish? early embryo development arrow to late embryo development images of embryos with labels all have gill slits, all have a tail

Explanation:

To determine the relatedness, we analyze embryonic development. In early embryos, chicken (a bird) and tortoise (a reptile) show more similar features (like gill slits and tails) that persist longer or have more shared developmental patterns compared to tortoise and fish. Fish embryos diverge earlier in development (e.g., fish retain more aquatic - adapted embryonic traits, while chicken and tortoise embryos develop more terrestrial - related structures as they mature, and their early embryos are more alike in morphology and developmental sequence). Also, from an evolutionary perspective, birds and reptiles (tortoise is a reptile) are in the amniote group, while fish are non - amniotes. The embryonic development evidence (similarities in early and later stages) supports a closer relationship between chicken and tortoise than tortoise and fish.

Answer:

The evidence from embryonic development: In early embryo stages, chicken and tortoise embryos have more similar features (e.g., gill slits, tails) that remain more alike as development progresses, compared to tortoise and fish embryos (fish embryos diverge more in development). Also, evolutionarily, chicken (bird) and tortoise (reptile) are amniotes, sharing a more recent common ancestor than tortoise (amniote) and fish (non - amniote), with embryonic development reflecting this relatedness.