Non-Chordate Animals

Some Study Topics Non-Chordate Animals

characteristics/ embryology of animals

levels of organization of animals (ex: Parazoa - Eumetozoa split

evolution of first animals

symmetry

acoelomates, pseudocoelomates, coelomates

protostomes vs deuterostomes

Cambrian Era

evolution of sponges

Cnidarian morphologies

characteristics of each phylum and class studied and examples of each class

significance of mesoderm/ coelom/ segmentation

metamorphosis

water vascular system

feeding, reproduction, respiration , circulation of phyla studied

Sample Multiple Choice Questions

1. A land snail, a clam, and an octopus all share

a. a mantle.

b. a radula.

c. gills.

d. embryonic torsion.

e. distinct cephalization.

2. Which of the following subdivisions of the animal kingdom encompasses all the others on the list?

a. bilateria

b. protostomes

c. pseudocoelomates

d. acoelomates

3. Spiders, insects, crustaceans, and centipedes are all arthropods. If one accepts the Uniramia as a valid taxon, then which of these four kinds of organisms are most closely related?

a. spiders and insects

b. insects and crustaceans

c. crustaceans and centipedes

d. centipedes and insects

e. spiders and crustaceans

4. Which of the following combinations of phylum and description is incorrect?

a. Echinodermata- branch bilateria, coelom from archenteron

b. Platyhelminthes- flatworms, coelomates

c. Nematoda- roundworms, pseudocoelomates

d. Cnidaria- radial symmetry, diploblastic

e. Porifera- acoelomate, diploblastic

f. a, b, and d are incorrect

g. b and e are incorrect

h. all are incorrect

i. none are incorrect

5. Among the characteristics unique to animals is

a. gastrulation.

b. multicelluarity.

c. sexual reproduction.

d. flagellated sperm.

e. heterotrophic nutrition.

Answers: 1.(a), 2.(a), 3.(d), 4.(g), 5.(a)

Sample essay questions:

1. Describe the structures of the water vascular system in a sea star.

2. Describe three modes of respiration in arthropods.

3. Your obnoxious next door neighbor accuses you of introducing a harmful nematode into her petunia bed. You point out three features on the suspect creature to your neighbor that indicates that it is not a nematode but a harmless and helpful earthworm.

a. What features would indicate it is an earthworm?

b. How would the animal's locomotion prove that it is an earthworm and not a nematode?