Questions and Answers
What is radial symmetry?
1
What are nematocysts found on tentacles?
2
Cnidarians use both asexual and sexual reproduction.
True
What is the gastrovascular cavity used for?
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What are the three main body plans of cnidarians?
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Cnidarians are vertebrates.
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Study Notes
Characteristics of Cnidarians
- Radial symmetry allows for a circular body plan, enabling equal distribution of body parts around a central axis.
- Nematocysts are specialized cells located on tentacles used for capturing prey and defense; they contain stinging organelles that can inject toxins.
- Reproduction in cnidarians can be both asexual, through budding or fragmentation, and sexual, involving gamete production and fertilization.
- The gastrovascular cavity serves as both a digestive and circulatory system, where food is ingested, digested, and nutrients are distributed throughout the organism.
- Cnidarians exhibit three main body plans: polyp (sessile form), colonial polyp (integrated group of polyps), and medusa (free-swimming form).
- Cnidarians are classified as invertebrates, meaning they lack a backbone, which distinguishes them from vertebrate animals.
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Description
Test your knowledge on the unique features of cnidarians through these flashcards. Explore concepts like radial symmetry, reproduction methods, and body plans. Perfect for biology students looking to enhance their understanding of this fascinating group of animals.
