Given the similar genetic network of developmental genes among bilaterians, what can we say about their common ancestor?
A) It may have grown some kind of outgrowth from its body wall.
B) It most likely had limbs used in movement.
C) It most likely had three pairs of legs, similar to insects.
D) none of the above

Question

Quizplus · Accepted Answer

The similar genetic network of developmental genes among bilaterians suggests that their common ancestor may have had the capability to grow some kind of outgrowth from its body wall, such as limbs or other appendages, as a basic feature of its body plan. This does not necessarily mean it had limbs used for movement or specifically three pairs of legs like insects, but rather that the genetic foundation for body outgrowths was present.

Given the Similar Genetic Network of Developmental Genes Among Bilaterians