8 Some molluscs have a radula, a ribbon-like structure that carries rows of small teeth.

9 Most molluscs have an external shell made of calcium carbonate.

10  Some gastropods use their radulas to scrape algae from rocks, and some are carnivores that may use the radula to rasp a hole in a prey's shell.

11 Cephalopods use a structure called a funnel to squirt out water from their mantle cavities in order to create a kind of jet propulsion.

12Squids and cuttlefish have internal shells.

  13 Most chitons (Polyplacophora) use their radulas to scrape algae off shoreline rocks.

14  Cephalopods are considered to have the most complex brain outside of the vertebrates, capable of advanced learning.

15 In bilaterally symmetric animals, the term "bilateral" indicates that there are one way of cutting the body to get two identical halves.

16  Brachiopods or lamp shells are not a type of mollusc with a two-part shell.

17  Most bivalves use their gills like a filter to trap small particles in the water

A.Polyplacophora (Amphineura )  B. Scaphopoda  C. Bivalvia (Pelecypods) D. Gastropods  E. Cephalopoda

Choose from the above for the classes of the described animals below.

18.  Which can produce pearls?

19  Which has the greatest number of species?

20.  Which has two shells?

21.  Which has 8 shells?

22.  Which is the most highly developed?

23.  Which have thread-like tentacles and live burrowed in the sand

24.  Which Class can change color?

.

Match the classes to the pictures

25 (A)Polyplacophora (Amphineura)   (B) Scaphopoda  (C) Gastropoda  (D) Cephalopoda  (E)  Bivalvia (Pelecypoda)

26.(A)Polyplacophora (Amphineura)  (B) Scaphopoda  (C) Gastropoda  (D) Cephalopoda  (E) Bivalvia (Pelecypoda)

27.(A) Polyplacophora (Amphineura)   (B) Scaphopoda  (C) Gastropoda  (D) Monoplacophora  (E)  Bivalvia (Pelecypoda)

28.(A)Polyplacophora (Amphineura)   (B) Scaphopoda  (C) Gastropoda  (D) Cephalopoda  (E)  Bivalvia (Pelecypoda)

29.(A)Polyplacophora (Amphineura)   (B) Scaphopoda  (C) Gastropoda  (D) Cephalopoda  (E)  Bivalvia (Pelecypoda)

30.(A)Polyplacophora (Amphineura)   (B) Scaphopoda  (C) Gastropoda  (D) Monoplacophora  (E)  Bivalvia (Pelecypoda)

31.  To replace the exoskeleton, crustaceans have to molt

32.  Barnacles are classified as Arthropods because they have jointed appendages

33.  Crustaceans breath using gills

34.  Small crustaceans which provide food for fish and mollusks and are capable of rapid population turnover are Copepods

35.  The hermit crab is said to be an intermediate between lobsters and crabs because

variable abdomen

36.  the abdomen located under the cephalothorax in the crab?

Match the animal with its Class  (23-25)

(A) horseshoe crab   (B) sea spider  (C) lobster

37.  Crustacea  

38. Merostomata  

39. Pycnogonida

40.  A small cephalochordate that is found in shallow inshore water is a  lancelet

41.  Crustacea  is the class of Arthropods dominant in the marine environment? 

42.  Amphipods are found on beaches usually under decaying seaweed

43      Echinoderms are animals characterized by Pentamerous Radial Symmetry

44      An organism with a long leathery body with feeding tentacles around the Mouth  is the Sea cucumber Water vascular system

45 Chaetognatha are animals that are largely carnivores:

46  The presence of a notochord first becomes evident in phylum Chordata

47. The Ascidacea are in subphylum Urochordata

48. The subphylum Urochordata includes Tunicates

49. starfish eat their meals by  flipping their stomach inside out and extrude it into a clamshell, digesting the meat externally

50. "Echinoderm" literally means spiny ski

51. The larva stage in the barnacle that swims and feeds is the nauplius larva

52.  The larva stage of the barnacle that is responsible for site selection for attachment is

cypris larva 

53. The spine (tail) of the horseshoe crab is used for   leverage

54 Barnacles use their antennae to filter particles out of the water.

55  Some of the most common and widespread marine animals are copepods.

56.  Horseshoe crabs are not true crabs.

57. Isopods have flattened bodies and live on rocks of the shore while Amphipods have a curved body and feed off detritus on

58Arthropods must discard (molt) their chitinous exoskeletons in order to grow.

59 Some amphipods can jump.

60 Copepod crustaceans typically use their antennae to swim in the plankton.

61 Decapods generally have 5 pairs of swimming legs on the cephalothorax.

62 Hermit crabs have a long, soft abdomen, while true crabs have a small abdomen tucked under

63 asteroidean echinoderms are carnivores, while most ophiuroideans eat particulate matter and small organisms off the bottom.

64 Sea urchins (echinoidean Echinodermata) feed with an elaborate jaw and muscle device called Aristotle's lantern.

65  Sea cucumbers (holothuroidean Echinodermata) are carnivores, using modified tentacular tube feet to grasp animal prey.

66 Echinoderms, hemichordates and chordates (which include humans) are all thought to be closely related because of common features in early embryonic development.

67 Sea squirts lose their notochord as adults.

68 Benthic sea squirts (ascidiacean Urochordata) and planktonic salps (thaliacean Urochordata) both filter-feed with an incurrent and excurrent siphon.

69 Lancets (Cephalochordata) are similar to vertebrates in structure except for the lack of a backbone.

70. Horseshoe crabs are more closely related to spiders than to crustaceans because they have mouthparts like the spiders rather than the biting mouthparts of the crustaceans.

71 The shell of a barnacle similar to an exoskeleton in other Arthropods.

72. All echinoderms are marine