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Questions and Answers
What does the term 'Oligochaeta' refer to?
What are earthworms classified as?
Oligochaeta
Which class of annelids is known for having many hair?
What is a key characteristic of the Polychaeta class?
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What does the term 'Hirudinae' refer to?
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How do leeches prevent blood clotting during feeding?
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All annelids are aquatic.
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Study Notes
Class Oligochaeta
- Characterized by having few bristles (setae).
- Includes earthworms and tubifex worms, both of which are important for soil aeration.
- Earthworms are vital to agriculture as they enhance soil fertility by breaking down organic matter.
Class Polychaeta
- Defined by the presence of many bristles (setae).
- Comprises marine annelids like bristleworms and fan worms.
- Many species possess advanced sensory structures, such as eyes.
- Each body segment typically features paired appendages known as parapodia, aiding in locomotion and respiration.
- Plays a crucial role in aquatic ecosystems, acting as important nutrient recyclers.
Class Hirudinae
- Commonly known as leeches, recognized for their flattened bodies and lack of setae.
- Primarily external parasites that feed on blood from hosts.
- Leeches secrete anesthetic compounds to numb the host and anticoagulants to prevent blood clotting during feeding.
- Historically used in medicine, particularly in bloodletting and increasing blood circulation.
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Description
Test your knowledge on the three main classes of Annelida: Oligochaeta, Polychaeta, and Hirudinae. This quiz covers their defining characteristics, ecological roles, and significance in agriculture and medicine. Challenge yourself to see how well you understand these fascinating segmented worms!
