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Questions and Answers
What is the main method of movement for ctenophores?
What is the main method of movement for ctenophores?
- Using groups of cilia for swimming (correct)
- Contracting and relaxing muscles
- Sailing with the help of a sail-like structure
- Using fins for propulsion
How large can adult ctenophores grow?
How large can adult ctenophores grow?
- Up to 10 meters (33 feet)
- Up to 50 centimeters (20 inches)
- Up to 1.5 meters (5 feet) (correct)
- Up to 3 meters (10 feet)
What distinguishes the body form of cydippids among ctenophores?
What distinguishes the body form of cydippids among ctenophores?
- Flat bodies without combs
- Thin, elongated bodies for efficient swimming
- Retractable tentacles for capturing prey (correct)
- Large mouths for capturing prey
What do beroids, a type of ctenophore, primarily prey on?
What do beroids, a type of ctenophore, primarily prey on?
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What is notable about the fossils thought to represent ctenophores?
What is notable about the fossils thought to represent ctenophores?
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Study Notes
Ctenophores
- The main method of movement for ctenophores is through the use of cilia, which are hair-like structures that propel them through the water.
- Adult ctenophores can grow up to 15 centimeters in length, although some species can reach sizes of up to 1 meter.
Body Form of Cydippids
- The body form of cydippids, a type of ctenophore, is distinguished by their oval-shaped bodies and pair of retractable tentacles.
Beroids
- Beroids, a type of ctenophore, primarily prey on small invertebrates, such as bristle worms and crustaceans.
Ctenophore Fossils
- The fossils thought to represent ctenophores are notable for their lack of hard body parts, making it difficult to identify them as ctenophores.
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