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Questions and Answers
What is the main reason for animal classification?
What is the main reason for animal classification?
To assign a systematic position to newly described species.
What level of organization do sponges exhibit?
What level of organization do sponges exhibit?
- Organ level
- Cellular level (correct)
- Tissue level
- Organ system level
All members of Animalia exhibit the same pattern of cell organization.
All members of Animalia exhibit the same pattern of cell organization.
False (B)
In animals like Annelids and Chordates, organs are associated to form __________.
In animals like Annelids and Chordates, organs are associated to form __________.
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What type of digestive system has only a single opening?
What type of digestive system has only a single opening?
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What are the two types of circulatory systems?
What are the two types of circulatory systems?
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Sponges are mostly symmetrical animals.
Sponges are mostly symmetrical animals.
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Study Notes
Animal Classification
- Provides a framework for understanding the diversity of animal life.
- Helps identify and organize animals based on shared characteristics.
Organization of Sponges
- Exhibit the cellular level of organization.
- Lack true tissues and organs.
Animal Cell Organization
- Not all animals exhibit the same pattern of cell organization.
- Sponges are an exception, lacking true tissues.
Organ Systems
- In animals like Annelids and Chordates, organs are associated to form organ systems.
- These systems work together to perform complex functions.
Digestive Systems
- Some animals have a single opening for both ingestion and excretion, called an incomplete digestive system.
- Others have separate openings for intake and waste removal, referred to as a complete digestive system.
Circulatory Systems
- Two main types of circulatory systems: open and closed.
- Open circulatory systems rely on hemolymph, while closed systems involve blood flowing within vessels.
Symmetry in Sponges
- Sponges are mostly asymmetrical animals.
- They lack a defined body plan or a plane of symmetry.
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