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Review Questions

BiologyReview 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
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