What Do Know About Phylum Echinodermata? Trivia Quiz
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Echinoderms are animals that belong to any member of the phylum Echinodermata. These animals are invertebrates having spiny skin which can easily be identified by their radial symmetry such as starfish, sea urchins, sand dollars, etc. This Phylum Echinodermata quiz has been developed to test your knowledge about different species that belong to Phylum Echinodermata.
In addition to their unique symmetry, echinoderms exhibit fascinating regenerative abilities and play crucial roles in marine ecosystems. Through this quiz, you’ll explore various aspects of their biology, habitats, and behaviors. Sharpen your understanding and discover intriguing facts about these remarkable creatures. Start the Read morequiz now! Read the questions carefully and answer. All the best!
Phylum Echinodermata Questions and Answers
- 1.
Which one is incorrectly paired?
- A.
Class Asteroidea - sea star
- B.
Class Ophiuroidea- feather star
- C.
Class Echinoidea – sea urchin
- D.
Class Holothuroidea- sea cucumber
Correct Answer
B. Class Ophiuroidea- feather starExplanation
Class Ophiuroidea includes brittle stars and basket stars, not feather stars. Feather stars belong to the Class Crinoidea. The other pairings are correct: sea stars are in Class Asteroidea, sea urchins are in Class Echinoidea, and sea cucumbers are in Class Holothuroidea.Rate this question:
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- 2.
True or False: Adult echinoderms are radially symmetrical.
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
Adult echinoderms exhibit radial symmetry, typically with a five-part (pentamerous) body plan. This means their body parts are arranged around a central axis, which is a defining characteristic of the phylum Echinodermata. However, their larvae are bilaterally symmetrical.Rate this question:
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- 3.
Which of the following is NOT true of echinoderms?
- A.
They are all marine
- B.
Adult echinoderms have a dorsal nerve cord
- C.
Their larvae are planktonic
- D.
Their larvae are bilaterally symmetrical
- E.
Adult echinoderms have pentamerous symmetry
Correct Answer
B. Adult echinoderms have a dorsal nerve cordExplanation
Adult echinoderms do not have a dorsal nerve cord. Instead, they have a decentralized nerve net. The other statements are true: echinoderms are exclusively marine, their larvae are planktonic and bilaterally symmetrical, and adult echinoderms typically exhibit pentamerous radial symmetry.Rate this question:
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- 4.
True or False? Echinoderms have an organ system level of organization.
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
Echinoderms possess an organ system level of organization. They have complex structures including a water vascular system for movement and feeding, a digestive system, a nervous system, and reproductive organs. This level of organization allows them to perform various functions necessary for survival.Rate this question:
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- 5.
The oral surface of most echinoderms
- A.
Is on its bottom side
- B.
Is where its mouth is
- C.
Is on its top side
- D.
A and b are correct
- E.
B and c are correct
Correct Answer
D. A and b are correctExplanation
The oral surface of most echinoderms, such as sea stars, is on the bottom side where their mouth is located. This allows them to feed effectively while moving along surfaces.Rate this question:
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- 6.
Which of the following is NOT true about tube feet?
- A.
The water vascular system ends in the tube feet
- B.
Tube feet are muscular
- C.
Tube feet are part of the endoskeleton
- D.
Tube feet are used for locomotion
- E.
Stimuli are received by the tube feet
Correct Answer
C. Tube feet are part of the endoskeletonExplanation
Tube feet are not part of the endoskeleton. They are part of the water vascular system, which is involved in movement, feeding, and sensory reception. The endoskeleton in echinoderms is composed of calcareous plates or ossicles, which provide structural support.Rate this question:
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- 7.
Which of the following is NOT a diagnostic characteristic of echinoderms?
- A.
Pentameral radial symmetry
- B.
A water vascular system
- C.
An internal skeleton
- D.
Tentacles that are used for locomotion
- E.
An organ system level of organization
Correct Answer
D. Tentacles that are used for locomotionExplanation
Echinoderms do not have tentacles used for locomotion. Instead, they use tube feet, which are part of their water vascular system, for movement. The other characteristics listed (pentameral radial symmetry, a water vascular system, an internal skeleton, and an organ system level of organization) are true diagnostic features of echinoderms.Rate this question:
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- 8.
Since a starfish has NO INTESTINE, the nutrients are absorbed by the
Correct Answer
digestive glandsExplanation
Starfish do not have an intestine like most animals do. Instead, they have a unique digestive system where their stomach extends through their mouth and into their arms. The digestive glands, located in the arms, are responsible for breaking down and absorbing nutrients from the food. This allows the starfish to extract the necessary nutrients for survival without the need for a traditional intestine.Rate this question:
- 9.
In Latin the name "echinoderm" means
Correct Answer
Spiny skinExplanation
The correct answer is "Spiny skin." The name "echinoderm" is derived from Latin, where "echinos" means "spiny" and "derma" means "skin." This term accurately describes the physical characteristics of echinoderms, which are marine animals with a rough, spikey, or spiny outer covering.Rate this question:
- 10.
Name one of the 3 characteristics that are found only in echinoderms
Correct Answer
Endoskeleton made of ossicles, water vascular system, and tube feetExplanation
Echinoderms have three unique characteristics that distinguish them from other animals. Firstly, they possess an endoskeleton made of ossicles, which are small, calcified plates that provide support and protection. Secondly, echinoderms have a water vascular system, a network of fluid-filled canals that helps in locomotion, respiration, and feeding. Lastly, they have tube feet, which are small, suction-cup-like structures used for movement, feeding, and attachment. These three characteristics are exclusive to echinoderms and are not found in any other group of animals.Rate this question:
- 11.
Water enters the water vascular system through small pores in the
Correct Answer
MadreporiteExplanation
The madreporite is a small pore located on the aboral surface of a sea star or sea urchin. It acts as the entrance for water into the water vascular system, which is a network of canals and tubes that helps with locomotion, feeding, and respiration in these organisms. Water enters through the madreporite and then circulates throughout the body, allowing for the movement of tube feet and the exchange of gasses.Rate this question:
- 12.
True or False: Starfish have closed circulation
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
Starfish, or sea stars, do not have a closed circulatory system. Instead, they possess an open circulatory system where the coelomic fluid moves freely within the body cavity, helping to transport nutrients and gases. Their water vascular system, which includes the tube feet, also plays a crucial role in their movement and circulation.Rate this question:
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- 13.
The small movable suction cupped extensions of the vascular system which aid in locomotion and feeding are called
- A.
Oral spine
- B.
Gills
- C.
Tube feet
- D.
Tentacles
Correct Answer
C. Tube feetExplanation
Tube feet are small, flexible, and suction-cupped extensions of the water vascular system in echinoderms like starfish and sea urchins. They play a crucial role in locomotion, feeding, and attachment to surfaces. These structures allow echinoderms to move, capture prey, and interact with their environment effectively.Rate this question:
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- 14.
All of the following are parts of the water vascular system EXCEPT
- A.
Stone canal
- B.
Ring canal
- C.
Ambulacral canal
- D.
Radial canal
Correct Answer
C. Ambulacral canalExplanation
Water vascular system consists of internal system of canals, tube feet(tentacle or tube-like projections of body wall), and madreporite (small opening to outside), below is the system for the sea star):
madreporite--> stone canal--> ring canal--> radial canals--> lateral canals--> ampullae--> tube feetRate this question:
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- 15.
The madreporite is a part of which body system?
- A.
Digestive system
- B.
Nervous system
- C.
Water vascular system
- D.
Circulatory system
Correct Answer
C. Water vascular systemExplanation
The madreporite is a sieve-like structure on the surface of echinoderms, such as starfish, that serves as the entry point for seawater into the water vascular system. This system is crucial for locomotion, feeding, and respiration in these organisms.Rate this question:
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Jun 10, 2024Quiz Edited by
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Sep 25, 2008Quiz Created by
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