Questions and Answers
What are Platyhelminthes commonly known as?
What is a characteristic of Turbellaria?
Free living flatworms
What type of worms are Cestoda?
Tapeworms
What are Trematoda commonly known as?
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What is a defining feature of Nemertea?
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What defines Nematoda?
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What type of larvae do Annelida produce?
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What are Echiura commonly known as?
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What are Polychaeta?
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What defines Errant Polychaetes?
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What are Serpulid worms known for?
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What is a characteristic of Sabellid worms?
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What are Spionid worms known for?
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What do Terebellid worms refer to?
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What are Pogonophorans?
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What are Osedax commonly known as?
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What are Spinuncula commonly referred to as?
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What are Chetognatha known as?
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Study Notes
Flatworms (Platyhelminthes)
- Characterized by a flat body shape and lack of circulatory or respiratory systems.
- Exhibit a blind gut, meaning they have a single opening for ingestion and excretion.
- Major classes include Turbellaria (free-living), Cestoda (tapeworms), and Trematoda (flukes).
Turbellaria
- Comprises free-living flatworms commonly found in aquatic environments.
Cestoda
- Known as tapeworms; they are not segmented and primarily parasitic.
Trematoda
- Commonly known as flukes; members are predominantly parasitic.
Ribbon Worms (Nemertea)
- Distinctive for their enclosed circulatory system and complete digestive tract.
- They lack a respiratory system but possess a proboscis for feeding.
Round Worms (Nematoda)
- Recognized for their round shape and presence of a complete gut.
- They are pseudocoelomates, meaning they have a body cavity not completely lined by mesoderm.
- Lack both circulatory and respiratory systems; movement is facilitated by longitudinal muscles.
Segmented Worms (Annelida)
- Feature a segmented body plan and undergo trochophore larval development.
- Have a closed circulatory system and a complete gut, yet no respiratory system.
- Possess setae (bristles) and both longitudinal and circumferential muscles for movement.
Spoon Worms (Echiura)
- Also known as innkeeper or weenie worms; belong to the Annelida phylum.
Polychaetes (Polychaeta)
- Characterized by numerous bristles and often segmented bodies.
Errant Polychaetes
- Free-living polychaetes that do not reside in tubes, showcasing mobile lifestyles.
Serpulid Worms
- Tube-dwelling polychaetes constructing white, hard tubes made of calcium carbonate.
- Known for the operculum on their tubes, exemplified by Christmas tree worms.
Sabellid Worms
- Distinct tube worms that create soft, dark tubes not composed of calcium carbonate and lack operculum.
- Commonly referred to as feather duster worms.
Spionid Worms
- Tube-dwelling worms featuring two long, prominent tentacles.
Terebellid Worms
- Known as spaghetti worms; these deposit feeders inhabit burrows.
Pogonophorans
- Tube worms that harbor chemosynthetic prokaryotic endosymbionts, contributing to unique ecological functions.
Osedax
- Known as bone-eating snot worms; a type of tube worm in the polychaeta class.
Peanut Worms (Spinuncula)
- Non-segmented worms lacking a circulatory system but possessing a complete gut and an introvert for probing the substrate.
Aero Worms (Chetognatha)
- Transparent and predatory plankton, contributing to marine food webs.
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Description
Explore the fascinating world of flatworms and other worm types like ribbon worms and round worms. This quiz covers their biological characteristics, classifications, and habitats. Test your knowledge on the differences among Turbellaria, Cestoda, and Trematoda, along with Nemertea and Nematoda.
