The evolutionary innovation that first appeared in arthropods and is characteristic of the most successful of all animal groups is that of
A)bilateral symmetry.
B)coelomic body architecture.
C)jointed appendages.
D)segmentation.
E)three primary types of tissues.

Question

Quizplus · Accepted Answer

Jointed appendages, which allow for a wide range of movement and specialization of limbs, first appeared in arthropods and have been a key factor in their success as a group. While bilateral symmetry, coelomic body architecture, segmentation, and three primary types of tissues are also important evolutionary innovations, they are found in many other animal groups as well.

The Evolutionary Innovation That First Appeared in Arthropods and Is