Zoology Lab Study Guide Midterm Exam

What is the mnemonic used for taxonomic classification from domain to species?

Darn = Domain, King = Kingdom, Philip = Phylum, Came = Class, Over = Order, For = Family, Good = Genus, Sex = Species.

What are the two main types of cleavage in embryonic development?

Radial and spiral cleavage.

In sponges, what is the purpose of flagella?

Flagella flow water through the sponge.

What is the term for the inner cavity of a sponge?

Spongocoel.

What are the three classes of sponges?

Demospongiae, Calcispongiae, Hexactinellida.

What type of symmetry do Cnidarians exhibit?

Radial symmetry.

What are the two life stages of Phylum Cnidaria?

Medusa and polyp stages.

What type of body structure do planarians possess?

Bilateral symmetry and flat, elongated bodies.

What is unique about the digestive system of planarians?

It is incomplete.

What is a distinguishing feature of Class Bivalva?

They possess an umbo on the outer side and gills with internal wings.

What is the primary function of the ink sac in Class Cephalopoda?

It is used for defense and is normally hidden under the organs.

What type of circulatory system do earthworms (Phylum Annelida) have?

Closed circulatory system.

What distinguishes Phylum Nematoda from other phyla?

They have no true segments and are round worms.

What is a characteristic of all Arthropoda?

They have jointed appendages and a chitinous exoskeleton.

What is the difference in legs between centipedes and millipedes in Myriapoda?

Centipedes have 1 leg per segment (carnivorous), while millipedes have 2 legs per segment (herbivorous).

What is the typical number of legs found in Decapod crustaceans?

10 legs.

What is a defining feature of insects in Subphylum Hexapoda?

They have 6 uniramous walking legs and often possess wings.