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No, echinoderms do not have bilateral symmetry. They have radial symmetry, which means their body parts are arranged around a central axis.

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7mo ago

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Why are echinoderms thought to have evolved from bilaterally symmetrical ancestors?

Echinoderms are thought to have evolved from bilaterally symmetrical ancestors because their larval forms exhibit bilateral symmetry. Over time, echinoderms undergo a process called pentaradial symmetry, where they develop a five-point radial symmetry characteristic of adult echinoderms. This suggests a modification from bilateral to radial symmetry during evolution.


Why do zoologist think that pentaradial symmetry was not present in the ancestor of echinoderms?

Zoologists believe that pentaradial symmetry was not present in the ancestor of echinoderms because this symmetry is a derived characteristic that evolved later in their evolutionary history. The ancestral echinoderms likely exhibited bilateral symmetry, similar to their closest relatives, such as chordates and other deuterostomes. Fossil evidence and comparative studies of living echinoderms suggest that the transition to pentaradial symmetry occurred after the divergence from their bilateral ancestors, as a response to their marine environments and ecological adaptations.


What is an sea stars symmetry?

The sea stars symmetry is radial symmetry as well as jellyfish.


Does a cat have a radial symmetry?

yes. because a symmetry is when you draw a reflection so radial reflection is just if you draw the reflection but in the colors it has drawn.


Type of symmetry exhibited by echinoderm larvae?

the same type as blue footed underwater donkeys.


Do goldfish have radial symmetry?

No; goldfish have bilateral symmetry.


What is the symmetry of the marine flatworm?

A marine flatworm has bilateral symmetry.


Do nematodes have radial or bilateral symmetry?

They have bilateral symmetry. Though they are round they don't have radial symmetry


Do mollusks have radially symmetry?

nope. Some bivalves have bilateral symmetry but no radial symmetry.


What type of symmetry do worms have?

Bilateral Symmetry


Does a butterfly have Radial symmetry or bilateral symmetry?

Bilateral Symmetry.


What kind of symmetry does the earthworm have?

bilateral symmetry- body plan in which an animal that can be dinided into 2 equal sdes.