Question

these are embryos at their most advanced stage, shortly before birth.
fish
salamander
tortoise
chick
rabbit
human
describe how the embryos changed for each of these organisms from their earliest to latest stages.

species	anatomical changes from early to late stages
chicken
rabbit
tortoise
salamander
fish

Explanation:

These changes reflect embryonic development patterns: early embryos share similar basic structures, while late-stage embryos develop species-specific traits adapted to their adult environments (aquatic, terrestrial, aerial). Traits like tail regression in humans, shell growth in tortoises, and fin specialization in fish are key adaptations that emerge as development progresses.

Answer:

Species	Anatomical Changes From Early to Late Stages
Chicken	Beak forms, wings/legs specialize, tail shortens
Rabbit	Furry features emerge, ears grow, limbs elongate
Tortoise	Shell develops, limbs form flipper-like appendages, head broadens
Salamander	External gills shrink, tail fin narrows, limbs fully form
Fish	Fins specialize, scales develop, head becomes streamlined