Membrane organelles known as contain enzymes specialized to break down ingested materials, secretions, and wastes.
a. lysosomes
b. ribosomes
c. vacuoles

Which element forms the basis of all organic organisms a carbon b oxygen c hydrogen d nitrogen

According to the cladogram, which organisms have roundworms as a common ancestor?

What function does the limb sever in each animal? how are the limb bones of the four animals similar? based on these similarities what can be inferred about the evolution of the four animals.