Question

Humans and blue whales have many shared structures. Based on this information, paleontologists know that these species descended from a common ancestor population that also had those body structures.

1.What are the descendants in this diagram?



2.What body structures did the common ancestor have?

Answer 1

1. Blue whales and humans

2. Back bone lungs

Answer 2

1. The descendants are Blue whales, and Humans

2. Back bone Lungs , radius and ulna (front limb bones), structures for producing milk

Explanation: It points to the descendants of common ancestors to blue whales and humans, If not please tell me more clearly what you meant by descendants.