Question

Which of the following statements are accurate? (MORE THAN ONE ANSWER)

A. Invertebrates are animals that lack a backbone
B. Ecdysozoans typically have an exoskeleton
C. Bilaterians include three clades:
1) Deuterstomia
2) Lophotrochozoa
3) Ecdysozoa
D. Givens about animal "A'
I. the animal has three prominent germ layers
II. an animal has bilateral symmetry
III. the animal lacks a backbone
You would be able to classify this animal, animal A, as a bilaterian
E. All animals share a common ancestor

Answer 1

The statements in options A,B,C,D and E are all correct.

A. Invertebrates lack a back bone

B. Ecdysozoans typically posses a flexible exoskeleton that protects these animals from harmful external factors like water loss.

C. Deuterstomia, Lophotrochozoa and Ecdysozoa are classes of Bilaterians.

D. Animal A is a bilateral because bilateral embryos are triploblastic possessing three germ layers, are bilaterally symmetrical and lack a back bone.

E. All animal from studies are found to have a common ancestry.