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.
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

Explanation:

Tiktaalik roseae is a transitional fossil (transitional form) between fish and tetrapods, showing traits of both. Relative dating determines fossil age, not ancestry connection. Evolution shows increasing complexity, so "decreasing complexity" is wrong. Analogous structures are for convergent evolution, not ancestry. So using transitional forms is the correct evidence.

Answer:

A. using transitional forms