Echinodermata: Marine Organisms Quiz

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Which of the following is a special characteristic of the phylum Echinodermata?

Asymmetrical body

Bilateral symmetrical body

Pentamerous symmetrical body (correct)

Hexamerous symmetrical body

What is the complex of tubes called that echinoderms have?

Water vascular system (correct)

Excretory system

Respiratory system

Digestive system

During which period were echinoderms well established, with an extensive fossil record?

Devonian period

Cambrian period (correct)

Jurassic period

Cretaceous period

Where are all the members of the phylum Echinodermata found?

Exclusively marine environments Signup and view all the answers

What is the meaning of 'Pentamerous symmetry' in echinoderms?

Division into two equal halves along five axes/radii Signup and view all the answers

Which member of the phylum Echinodermata possesses an internal mesodermal skeleton composed of numerous ossicles of calcium carbonate?

Sea urchins Signup and view all the answers

What characteristic feature gives the animals in the phylum Echinodermata their name?

Spiny or echino skin Signup and view all the answers

What is the main example used to describe the features of echinoderms in the session?

Starfish Signup and view all the answers

What is the composition of the internal mesodermal skeleton in members of the phylum Echinodermata?

Calcareous ossicles with little magnesium carbonate Signup and view all the answers

Why do most modern echinoderms show pentamerous symmetry as adults?

Due to a primarily sessile way of life Signup and view all the answers

Echinodermata: Marine Organisms Quiz

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Questions and Answers

Which of the following is a special characteristic of the phylum Echinodermata?

What is the complex of tubes called that echinoderms have?

During which period were echinoderms well established, with an extensive fossil record?

Where are all the members of the phylum Echinodermata found?

What is the meaning of 'Pentamerous symmetry' in echinoderms?

Which member of the phylum Echinodermata possesses an internal mesodermal skeleton composed of numerous ossicles of calcium carbonate?

What characteristic feature gives the animals in the phylum Echinodermata their name?

What is the main example used to describe the features of echinoderms in the session?

What is the composition of the internal mesodermal skeleton in members of the phylum Echinodermata?

Why do most modern echinoderms show pentamerous symmetry as adults?

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