Question

Fossils provide scientists with evidence that allows them to hypothesize how living organisms have evolved over time. Tiktaalik roseae was a unique organism that has been nicknamed the “fishapod” because it is believed to be a species had traits of both fish and tetrapods, the first four-legged animals.
A fishapod.

Which evidence would scientist use to make the connection between ancestry of fish and tetrapods using Tiktaalik roseae?
using transitional forms
using relative dating
studying decreasing complexity
studying analogous structures

Answer 1

Using transitional forms.

Tiktaalik is considered a transitional fossil because it shows a mix of fish-like (scales, fins, gills) and tetrapod-like traits (wrist/arm bones in its fins, a neck, flat skull), providing direct morphological evidence of the evolutionary link between fish and early four‑legged vertebrates.