Question

question 2 of 10
which animal adaptation happened before the others?
a. development of a coelom
b. backbone and skull
c. reproduction on land
d. lungs

Explanation:

In the evolutionary history of animals, the development of a coelom (a body - cavity) occurred earlier in the evolutionary timeline compared to the other adaptations. Backbone and skull development, reproduction on land, and the evolution of lungs are more advanced adaptations that came later as animals became more complex and adapted to different environments.

Answer:

A. Development of a coelom