Review Questions

Mesohyl contains:

1. a polysaccharide gel and dead cells
2. a collagen-like gel and suspended cells for various functions
3. spicules composed of silica or calcium carbonate
4. multiple pores

The large central opening in the Parazoan body is called the:

1. gemmule
2. spicule
3. ostia
4. osculum

Cnidocytes are found in _____.

1. phylum Porifera
2. phylum Nemertea
3. phylum Nematoda
4. phylum Cnidaria

Cubozoans are ________.

1. polyps
2. medusoids
3. polymorphs
4. sponges

Annelids have a:

1. pseudocoelom
2. a true coelom
3. no coelom
4. none of the above

Which group of flatworms are primarily ectoparasites of fish?

1. monogeneans
2. trematodes
3. cestodes
4. turbellarians

A mantle and mantle cavity are present in:

1. phylum Echinodermata
2. phylum Adversoidea
3. phylum Mollusca
4. phylum Nemertea

The rhynchocoel is a ________.

1. circulatory system
2. fluid-filled cavity
3. primitive excretory system
4. proboscis

The embryonic development in nematodes can have up to __________ larval stages.

1. one
2. two
3. three
4. five

The nematode cuticle contains _____.

1. glucose
2. skin cells
3. chitin
4. nerve cells

Crustaceans are _____.

1. ecdysozoans
2. nematodes
3. arachnids
4. parazoans

Flies are_______.

1. chelicerates
2. hexapods
3. arachnids
4. crustaceans

Echinoderms have _____.

1. triangular symmetry
2. radial symmetry
3. hexagonal symmetry
4. pentaradial symmetry

The circulatory fluid in echinoderms is _____.

1. blood
2. mesohyl
3. water
4. saline