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Sea urchins

sea urchins

Somewhat flattened, globular echinoderms of the class echinoidea, having thin, brittle shells of calcareous plates.

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Re: Evolutionary mechanisms

... I remember reading a similar (but more complicated) story about orcas, seals, sea lions, fish, sea otters, kelp and sea urchins one time.....I should look that up....

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by thoffnagle
Mon Jul 01, 2013 6:12 pm
Forum: Evolution
Topic: Evolutionary mechanisms
Replies: 13
Views: 8702

Re: difference between over-expression and a genomic rescue

... technique in embryo studies, where (at least for zebrafsih, Xenopus, sea urchins and Ciona) the plasmid or mRNA us generally microinjected into the early zygote though ...

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by jonmoulton
Thu May 26, 2011 4:14 pm
Forum: Molecular Biology
Topic: genomic rescue
Replies: 3
Views: 6672

Help me for Biomimicry!

Hedgehogs? I would surmise that some of the sea urchins etc do, as their spines seem to be radial all over, so potentially could go in any direction, ...

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by Julie5
Sat Dec 04, 2010 3:31 pm
Forum: General Discussion
Topic: Help me for Biomimicry!
Replies: 3
Views: 1750

Re: Evolution of sexual reproduction

... arthropods (crustaceans, insects, and trilobites), echinoderms (sea star and sea urchins), and the chordates (animals with backbones), the phylum to which all vertebrates including ...

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by jevg
Tue Aug 24, 2010 7:21 pm
Forum: Evolution
Topic: Evolution of sexual reproduction
Replies: 29
Views: 36191

The Colin Leslie Dean species paradox

... squid, clam); Annelida (segmented worms); Echinodermata (starfish, sea urchins) and many, many more. http://en.wikipedia.org/wiki/Species Total number of species ...

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by gamila
Wed Jul 15, 2009 12:45 pm
Forum: Evolution
Topic: The Colin Leslie Dean species paradox
Replies: 135
Views: 186381
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