7. Which of the following statements are accurate?
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

Option A, B, D, E are correct

Explanation:

Invertebrates are animals without a backbone. Ecdysozoans typically have an exoskeleton and are give this name because they shed their cuticle and include crustaceans, arthropods, etc. A bilaterian typically has three body layers: endoderm, exoderm, mesoderm with a bilateral symmetry and do not possess backbone. All animals share a common ancestor with the sponges being the first to diverge from the complex group.

A,B,D and E.

Explanation:

Invertebrates are group of animal that lack vertebra column or backbone examples include all phylum except phylum vetebrata. E.g phylum porifera, arthropods, cnidarians e.t.c.

Ecdysozoans are group of protosome animals that have exoskeleton and they include arthropods, crustaceans e.t.c

A bilaterian is an animal that is triploblastic, lack back bone and is bilateral symmetrical.

All animals share common ancestors.

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