Scelta multipla
Which of the following is a characteristic of cnidarians?
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31. Invertebrates
Porifera and Cnidaria
Scelta multipla
Which type of cnidarians exist only in the polyp form throughout their life cycle?
A
Anthozoans
B
Scyphozoans
C
Cubozoans
D
Hydrozoans
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Understand the life cycle of cnidarians, which typically includes two forms: the polyp and the medusa. The polyp form is sessile, while the medusa form is free-swimming.
Identify the four main classes of cnidarians: Anthozoans, Scyphozoans, Cubozoans, and Hydrozoans.
Learn that Anthozoans, such as corals and sea anemones, exist only in the polyp form throughout their life cycle. They do not transition to a medusa form.
Recognize that Scyphozoans, Cubozoans, and Hydrozoans can have both polyp and medusa stages in their life cycle, although the prominence of each stage can vary.
Conclude that the class of cnidarians that exists only in the polyp form throughout their life cycle is Anthozoans.
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