Questions and Answers
Which Cnidarian class is characterized by being colonial and having both polyp and medusa forms?
Which Cnidarian class is known for most of the jellyfish?
What type of jellyfish is found in the class Cubozoa?
Box jellies
What type of Cnidarians are included in the class Anthozoa?
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Study Notes
Hydrozoa
- Cnidarian class that includes both freshwater and marine species.
- Characterized by a colonial lifestyle, often forming large, interconnected structures.
- Possesses two main body forms: polyp and medusa.
Scyphozoa
- Primarily consists of jellyfish, known for their gelatinous bodies.
- Mostly exists in the medusa form, which is the dominant stage in their life cycle.
- Polyps in this class are referred to as scyphistoma and reproduce medusa through a process called strobilation.
Cubozoa
- Known as box jellies, this class is recognized for its unique box-like shape.
- In Cubozoans, the polyp stage develops directly into a medusa, bypassing strobilation, which is a characteristic difference from other classes.
Anthozoa
- This class includes colonial organisms such as corals and anemones.
- Displays bright coloration, primarily due to the presence of mutualistic algae that live within their tissues, providing energy through photosynthesis.
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Description
This quiz explores the four major classes of Cnidarians: Hydrozoa, Scyphozoa, Cubozoa, and Anthozoa. Each class's unique characteristics, life cycles, and notable features are discussed. Test your knowledge on these fascinating marine creatures!
