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Echinodermata Phylum

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Questions and Answers

What type of symmetry do Echinoderms typically possess?

Bilateral symmetry
Radial symmetry (correct)
Asymmetrical
Spherical symmetry

What is the function of the water vascular system in Echinoderms?

Protection of the internal organs
Excretion of waste
Circulation of blood
Hydraulic operation of tube feet or feeding tentacles (correct)

What is the characteristic of the body cavity of Echinoderms?

Schizocoel
True coelom (correct)
Haemocoel
Pseudocoelom

What is the function of the calcareous plates in Echinoderms?

Providing structural support and protection (A) Signup and view all the answers

What is the characteristic of the nervous system of Echinoderms?

Circum-oesophageal ring (C) Signup and view all the answers

What is the characteristic of the body shape of Echinoderms?

Highly variable with no head (A) Signup and view all the answers

What is the main function of the coelomic lining in echinoderms?

To separate the animal's guts from its skin (C) Signup and view all the answers

What is the composition of the middle layer of the echinoderm body wall?

Connective tissue and the exoskeleton (B) Signup and view all the answers

What is the primary component of the echinoderm exoskeleton?

Calcite (C) Signup and view all the answers

What is the characteristic of the plates or ossicles that make up the exoskeleton of Sea Cucumbers?

Small and widely separated (B) Signup and view all the answers

What is the result of the continuous growth of the echinoderm exoskeleton?

Older animals are always larger than younger ones (A) Signup and view all the answers

What is the function of the spines, warts, and tubercles found on the surface of echinoderms?

To provide protection and support the exoskeleton (B) Signup and view all the answers

What is the main characteristic of the body structure of most living echinoderms?

Pentameral symmetry (D) Signup and view all the answers

What is the function of tube feet in echinoderms?

Locomotion and sensing (D) Signup and view all the answers

What is the composition of the body covering of echinoderms?

Calcite (B) Signup and view all the answers

How many arms or rays do echinoderms typically have?

Five or multiples of five (D) Signup and view all the answers

What type of symmetry do echinoderms exhibit?

Radial symmetry (D) Signup and view all the answers

What is the name of the body covering of echinoderms?

Test (A) Signup and view all the answers

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