Unit #5 Quiz #2
Grade:«grade»
Subject:«subject»
Date:«date»
1 Which of the following echinoderms have primitive gills:
A Sea Urchin
B Sea Star
C Sand Dollar
D Sea Cucumber
2 A sea star is torn in half by a predator. What must be included in the remaining sea star for it to be able to completely regenerate?
A A majority of the arms
B A fragment of the stomach
C A fragment of the central disc
D A majority of the water vascular system
3 The animal in the following pictures represents ___________.
A asymmetry
B radial symmetry
C bilateral symmetry
D hexamerism
4 What chemical makes up the endoskeleton of echinoderms?
A Chitin
B Spicules
C Spongin
D Calcium carbonate
5 Which of the following does NOT describe a defense mechanisms found within echinoderms:
A A sea cucumber expelling its intestines out to scare off predators
B A sea star tearing itself in half to intimidate predators
C A sea urchin having poisonous spines on its back
D A brittle star being able to regenerate a leg dropped from its body when a predator grabbed it
6 The water vascular system found within echinoderms is an evolutionary precursor to which of the following systems:
A Endocrine system found within humans
B Excretory system found within humans
C Cardiovascular system found in humans
D Respiratory system found within humans
7 You reach into a tank and poke a brittle star fish. It responds by quickly moving under a nearby rock and curling into a ball. Which receptor provides the information allowing the brittle star to know that it is under a rock:
A Photoreceptor
B Thigmoreceptor
C Chemoreceptor
D Statocyst
8 One advantage of a complete digestive system over an incomplete digestive system is that an organism with a complete system:
A Must pause to eject waste through its mouth prior to eating a food source larger than its’ GVC
B Can continue to consume food without having to eject that food through the same orifice that it is consuming food
C Must input food through multiple orifices while ejecting waste out of similar orifices
D An organism can simply diffuse nutrients through the thin tissues surrounding the organism
9 Brittle stars and sea stars differ in their modes of movement in that:
A Brittle stars use hydraulics within their tube feet to suction onto a surface and hold there for a long period of time, while sea stars drag themselves across a surface with tube feet that resemble spines
B Sea stars use hydraulics within their tube feet to suction onto a surface and hold there for along period of time, while brittle stars drag themselves across a surface with tube feet that resemble spines
C Brittle stars use their tube feet to slide across a surface similar to the motion of a hover craft
D Sea stars can push water out of their mouth to lift themselves off of a surface and push themselves onto another, whereas s brittle star must climb up the same object
10 Why do sea urchins have the longest tube feet of all echinoderms?
A They need long tube feet to reach beyond or between their protective spines
B The need the long tube feet to reach food from their most anterior end to their most posterior end to feed
C They use these long tube feet to help open and close their shell-crushing teeth
D They use these long tube feet to open the shells of the strongest bivalves
11 Tube feet found within an echinoderm are responsible for all of the following EXCEPT:
A Feeding
B Digestion
C Locomotion
D Absorbing dissolved oxygen
12 Sea stars lack teeth, but are active carnivores. How do they accomplish this?
A Sea stars use their tube feet to tear their prey apart
B Sea stars use their spines to poison prey prior to eating it
C Sea stars use their water vascular system to asphyxiate their prey
D Sea stars eject their stomach/digestive enzymes to dissolve their prey