Name: __________________________________ Date: _________________________ Pd: _____________
Marine Invertebrate Jeopardy Review
Phylum Cnidaria
10 pts: What are two examples of animals that of part of Phylum Cnidaria?
 Corals, sea anemones, and jellyfish
20 pts: Which type of body symmetry do all cnidarians have in common?
 Radial symmetry
30 pts: Why are nematocysts important to cnidarians such as fire corals and jellyfish?
 Stinging cells on tentacles. Important in defense and a way of killing prey for food
40 pts: Cnidarians have a polyp body form and a medusa body form. How are these two body forms different? Explain in detail.
 In polyp form, a cnidarian is sessile (stays in one place) and has tentacles pointing up. In medusa form, cnidarian is mobile and has tentacles facing down.
50 pts: Why is the Portuguese Man of War more complex than other Cnidarians?
 Portuguese Man of War is part of Class Hydrozoa and is different because it has highly specialized polyps that perform different functions (ie feeding and reproduction)
Phyla Platyhelminthes, Nematoda and Annelida
10 pts: Which phylum has flatworms with a simple digestive system where there is only one opening for food and waste?
 Phylum Platyhelminthes
20 pts: Which phylum has roundworms with a simple but complete digestive system?
 Phylum Nematoda
30 pts: How are flatworms and roundworms different besides their body shapes?
 Flatworms have an incomplete digestive system and roundworms have a complete digestive system.
40 pts: If you find a polychaete marine worm that has metamerism (its body is divided into segments), which phylum do you predict it belongs to and why?

 It will belong to Phylum Annelida since annelids are more complex than the other worms and have body segments.
50 pts: If you find a worm that has a flat shape but also has a complete digestive system, which phylum do you predict it belongs to and why?
 It belongs to Phylum Nematoda because it has flat shape but it also has complete digestive system which is different from Phylum
Platyhelminthes.
Phylum Mollusca
10 pts: What are the 3 characteristics that all mollusks have in common?
 Muscular foot, Radula, and Mantle
20 pts: If you found a mollusk such as an octopus or squid, which class would it belong to and why?
 Class Cephalopoda because they have a 'head foot.' They have a head with a complex nervous system and a foot attached to the head and divided into parts (tentacles).
30 pts: If you found a snail or sea slug at the beach, which class would it belong to and why?
 Class Gastropoda because they have a large muscular foot below the head that is used for locotmotion and most have a shell for protection.
40 pts: If you found a mollusk such as a clam or oyster on the beach, which class would it belong to and why?
 Class Bivalvia because they have two hinged shells.
50 pts: Why is the mantle important to all mollusks? Give at least two examples of how it is used by mollusks.
 The mantle is a muscular bag that surrounds and holds the gills and most organs,used to circulate water or jet water for propulsion, and used to secrete a calcium carbonate shell for protection.
Phylum Echinodermata
10 pts: What are the two purposes of a sea star's tube feet?
 Capturing prey and movement
20 pts: What are the two purposes of a sea urchin's spine?
 Protection (self defense) and locomotion (movement)
30 pts: Which invertebrate is similar to a sea star in that it has radial symmetry but it has a disk shaped body?

 Sand Dollar
40 pts: What are the 3 characteristics that all Echinoderms have in common?
 Spiny skin, tube feet, and radial symmetry
50 pts: Why is the water vascular system important to sea stars?
 This system transmits or withdraws pressure in different parts of the sea star and that is what causes the tube feet to move or remain still.
Phyla Arthropoda and Porifera
10 pts: What is an example of an animal found in Phylum Porifera?
 Sponges
20 pts: What are two examples of animals found in Phylum Arthropoda?
 Lobsters, Crabs, Shrimp, and Barnacles
30 pts: Why are chelipeds important to lobsters and crabs?
 Chelipeds are the front claws used by lobsters and crabs for feeding.
40 pts: Why is the oscula an important part of the sponge?
 Oscula is important because it is a large opening that lets filtered water pass in and out of the sponge which is how they feed.
50 pts: Why are spicules important to the sponge?
 Spicules are important to the sponge because they provide structural support.