Question

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

A. Bilaterians include three clades:
1. Deuterstomia
2. Protostomia
3. Ecdysozoa
B. Invertebrates are animals that lack a backbone
C. Lophotrochozoans, which includes molluscs and insects, typically have an exoskeleton that they can shed.
D. All animals except sponges share a common ancestor
E. 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 only be able to classify this animal, animal A, as a lophotrochozoa

Answer 1

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

A. Deuterstomia, Protostomia and Ecdysozoa are clades of bilaterians.

B. Invertebrates do not posses a back bone.

C. Lophotrochozoans posses a flexible exoskeleton for protection from harmful environments.

D. Studies show that sponges do not consist in a group with a common ancestry hence all animals except sponges share a common ancestor.

E. Lophotrochozoans posses three germ layer: the endoderm mesoderm and ectoderm, are bilaterally symmetrical and are invertebrates.