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1. Polyp

2. Medusa

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What body systems do cnidarians have?

The body systems that cnidarians have take two forms. The main body forms are medusa and polyp. Cnidarians do not have a transport system and the body surface is used for gaseous exchange.


What are the two forms of cnidarians?

Cnidarians come in two forms: a medusa has tentacles that hang down and polyps usually live attached to a surface.


What are two forms of shape within cnidarians?

poly and medusa


Two main forms of life for the cnidarians?

Polyps, which are Sessile or stationary, and Medusa which move.


What is the segmentation for cnidarians?

Cnidarians are segmented into two main classes: Anthozoa (sea anemones and corals) and Medusozoa (jellyfish and hydrozoans), based on their body forms. Anthozoa are generally sedentary, with a polyp body form, while Medusozoa are typically free-swimming with a medusa body form.


What are two forms of cnidrians?

The two forms of Cnidarians are the Medusoid or mobile form (e.g. Hydra), and the Polyp or sessile form (e.g. Aurelia).


What do the two body forms of cnidarians look like?

Cnidarians have two main body forms: the medusa form, which is free-swimming and umbrella-shaped, and the polyp form, which is stationary and tube-shaped. Medusae have tentacles around the edge and a central mouth, while polyps have a columnar body with tentacles surrounding a central mouth.


What are made up of two cell layers and have only one body opening?

Cnidarians.


What are two types of cnidarians that are formed by colonies?

small cnidarians and big cnidarians


Do cnidarians have specialized teeth?

No. Cnidarians do not have teeth or any hard body parts.


How did polymorphism in cnidarians influence adaptive radiation of the group?

Polymorphism in cnidarians, such as having different body forms like medusae and polyps, allowed for niche differentiation and exploitation. This increased the ecological diversity within the group, facilitating adaptive radiation into various habitats and lifestyles. These different forms allowed cnidarians to occupy different ecological niches, promoting speciation and diversification.


Cnidarians such as jellyfish have radial symmetry. How are the body parts of cnidarians arranged?

like spokes on a wheel