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Questions and Answers
What are the primary characteristics of molluscs?
What are the primary characteristics of molluscs?
Molluscs have three segmented body parts (foot, body, and mantle), can possess a shell, and have complete digestive and circulatory systems.
Name two examples of flatworms and describe a key feature of their anatomy.
Name two examples of flatworms and describe a key feature of their anatomy.
Examples of flatworms include tapeworms and flukes. They have flat, segmented bodies and a single opening to their digestive cavity.
How do invertebrates differ from vertebrates in terms of structural features?
How do invertebrates differ from vertebrates in terms of structural features?
Invertebrates lack a backbone or spinal column, while vertebrates possess a well-defined vertebral column.
What type of digestive system do molluscs have, and how does it compare to that of flatworms?
What type of digestive system do molluscs have, and how does it compare to that of flatworms?
Which group of invertebrates is characterized by a hard exoskeleton and jointed limbs?
Which group of invertebrates is characterized by a hard exoskeleton and jointed limbs?
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Study Notes
Kingdom Animalia
- Two main groups: Vertebrates and Invertebrates
Invertebrates
- Divided into 8 groups: Molluscs, Flatworms, Annelids, Roundworms, Sponges, Echinoderms, Cnidarians, and Arthropods
Molluscs
- Have three distinct body parts: a foot, a body, and a mantle (which may produce a shell)
- Possess a single fleshy pad
- Shell is not essential, but some species have them
- Have complete digestive and circulatory systems
- Examples: Squid, snails, octopus, and clams
Flatworms (Platyhelminths)
- Flat, segmented worm-like bodies
- Single opening to the digestive cavity
- Lack a true coelom (body cavity)
- Examples: Tapeworms and flukes
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