The evolution of notochord development in ascidians is best explained by
A)a new gene mutation.
B)the co-option of an existing gene for a new function.
C)homoplastic convergence.
D)gene duplication and divergence.
E)conserved genes.

Question

Quizplus · Accepted Answer

The evolution of notochord development in ascidians is believed to be the result of the co-option of an existing gene for a new function. In this case, a gene that was previously used for other purposes was adapted for use in notochord development.

The Evolution of Notochord Development in Ascidians Is Best Explained