AP Biology Name __________________________
Guided Reading Chapter 32
1. Define the following terms:
a. Cleavage

b. Blastula

c. Gastrula

d. Larva

e. Metamorphosis

2. Label the diagram below of early embryonic development

3. What is believed to be the common ancestor of living animals?

4. What are two hypotheses for the Cambrian Explosion?

5. Define the following terms with regard to animal body plans.
a. Grade

b. Body plan

c. Radial symmetry

d. Bilateral symmetry

e. Dorsal

f. Ventral

g. Anterior

h. Posterior

i. Cephalization

j. Germ layers

k. Endoderm

l. Ectoderm

m. Archenteron

n. Diploblastic

o. Triploblastic

p. Mesoderm

q. Body cavity

r. Coelom

s. Pseudocoelomate

t. Coelomate

u. Acoelomate

6. Label the following diagram

7. Use the unlabeled diagram to compare and contrast protostomes and deuterostomes development.

8. What is the difference between determinate cleavage, radial cleavage and indeterminate cleavage?

9. What is the difference between schizocoelous and enterocoelous?

10. What are the 5 points of agreement on animal phylogeny?
a.

b.

c.

d.
e.
11. Studying the two phylogenic trees on pages 634-635 – what is the basic disagreement – what does the molecular data tell us? Use the following vocabulary in your response: ecdysozoans, lophotrochozoans, lophophore and trochophore larva. Points will be deducted if you do not use all of these terms.