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Questions and Answers
What is Phylum Hemichordata also known as?
What is Phylum Hemichordata also known as?
What are the organisms classified under Class Echinoidea?
What are the organisms classified under Class Echinoidea?
Sea urchins and sand dollars
What is Class Holothuroidea known for?
What is Class Holothuroidea known for?
Sea cucumbers
Which marine creature is classified under Class Ophiuroidea?
Which marine creature is classified under Class Ophiuroidea?
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What type of organisms are found in Class Crinoidea?
What type of organisms are found in Class Crinoidea?
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What do we call the organisms in Class Asteroidea?
What do we call the organisms in Class Asteroidea?
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Study Notes
Phylum Echinodermata Classification
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Phylum Hemichordata:
- Commonly known as acorn worms.
- Characterized by characteristics that relate them to both echinoderms and chordates.
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Class Echinoidea:
- Includes sea urchins and sand dollars.
- Known for their hard, endoskeletal plates and radially symmetrical body.
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Class Holothuroidea:
- Comprises sea cucumbers.
- Noted for their elongated bodies and soft, leathery texture.
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Class Ophiuroidea:
- Represents brittle stars.
- Features long, flexible arms and a distinct central disc.
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Class Crinoidea:
- Contains sea lilies and feather stars.
- Often attached to the substrate by stalks in sea lilies, with feather stars being free-moving.
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Class Asteroidea:
- Includes sea stars (starfish).
- Recognizable by their star-shaped body and ability to regenerate lost limbs.
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Test your knowledge on the classification of Phylum Echinodermata with these flashcards. Each card provides a term and its corresponding definition, covering various classes such as Echinoidea and Asteroidea. Perfect for students looking to enhance their understanding of marine biology.
