bio discrepency...

[DAT-Scared]

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One question,
echinoderms are Radially symmetrical in the Kaplan book, but in Campbell biology it says that they are "definetely Bilateral" however, they possess secondary radial symmetry in the adult form, what should I consider them?????

 

[armorshell]

One question,
echinoderms are Radially symmetrical in the Kaplan book, but in Campbell biology it says that they are "definetely Bilateral" however, they possess secondary radial symmetry in the adult form, what should I consider them?????

Echinoderms are bilateral as embryos, and radial in their adult form.


So it depends on the question!

 

[Resonance]

One question,
echinoderms are Radially symmetrical in the Kaplan book, but in Campbell biology it says that they are "definetely Bilateral" however, they possess secondary radial symmetry in the adult form, what should I consider them?????

Armorshell, is right they are bilateral larva and radial as adults. I believe it is called secondary radial symmetry.