Question

what can we learn about vertebrate evolution from tiktaalik that we did not know before?
how vertebrates evolved tetrapod limbs
how vertebrates evolved lungs
how vertebrates evolved gills
how vertebrates evolved jaws
how vertebrates evolved vertebrae

Explanation:

Tiktaalik is a fossil organism that provides significant insights into vertebrate evolution. It is known for its intermediate features between fish and tetrapods. Tetrapod limbs are a key aspect of vertebrate evolution onto land. While the evolution of lungs, gills, jaws, and vertebrae are important aspects of vertebrate evolution, Tiktaalik's most notable contribution in the context of new knowledge is regarding the evolution of tetrapod limbs. It shows a transitional form with fin - like structures that have features similar to early tetrapod limbs.

Answer:

how vertebrates evolved tetrapod limbs