Porifera & Cnidarian
True or False: Porifera are classified by the type of spicules they have.
True
The name “echinoderm” means ___?
spiny skin
Name a member of the phylum platyhelminthes?
planaria, flukes, or tapeworms
Members of which class are different from other mollusks by having a closed circulatory system (needed because they are active predators and move quickly)?
cephalopods
Which class is the largest class of mollusks, represented by snails, slugs, and other stomach-footed animals?
gastropoda
The skeleton of sponges is composed of ____ .
Spongin and/or spicules
The fused, solid endoskeleton found in sand dollars and sea urchins is called a __.
test
What kind of symmetry do you find in the flatworms, roundworms, and segmented worms?
bilateral symmetry
What dorsal structure in mollusks produces a shell?
mantle
Which of the following classes are all filter feeders and do NOT have a radula?
gastropods, cephalopods, bivalves, chitons
bivalves
Sponges are filter feeders, creating currents of water through their bodies with specialized cells called ___.
choanocytes
Which body system is completely unique to echinoderms?
water vascular
The body of a tapeworm, which is a chain of “clones” is given the same name as the stack of reproductive polyps found in some jellyfish. What are both these structures called?
strobila
True or False: Arthropods have an exoskeleton which is the source of the phylum name “jointed foot”
True
Arthropods undergo ecdysis (molting) in order to ___ .
grow
Which of the following would be medusoid?
hydra, sea anemone, jellyfish, coral
jellyfish
Which kind of starfish has a distinct central body disk, moves with long flexible arms, and are primarily scavengers?
Brittle stars (Ophiuroidea)
Which worm phylum contains the earthworms, bristle worms, tube worms, and leeches?
Annelida
Chelicerates are characterized by what feature?
They lack antennae.
Which type of animal fits the following description? Two pairs of legs per segment, non-venomous, slow moving, herbivore.
Millipede
How do Cnidarians and Flatworms carry out gas exchange?
Diffusion
Echinoderms have what kind of symmetry?
five-part, bi-radial
Which worm phylum is psuedocoelomate?
Nematoda
Crustaceans have two pair of ____ .
antennae
The uniramians (which contain the insects) typically have (#?) body parts and (#?) legs.
3, 6