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Sea urchins are members of the phylum Echinodermata, which also includes sea stars, sea cucumbers, sand dollars, brittle stars, and crinoids. Like other echinoderms, they have five-fold symmetry (called pentamerism) and move by means of hundreds of tiny, transparent, adhesive " tube feet ".
urchin. Characteristics of individual repetitive sequence families in the sea urchin genome studied with cloned repeats. In animal systems, studies on the activation of sea urchin and clam eggs have also found changes in enzyme activity and location.
Here's the sea urchin 101. Everything you need to know about these spiky echinoderms. Sea urchins (Echinoidea, regular urchins, porcupines of the sea). Sea u...
Sea urchin, any of about 950 living species of spiny marine invertebrate animals (class Echinoidea, phylum Echinodermata) with a globular body and a radial arrangement of organs, shown by five bands of pores running from mouth to anus over the test (internal skeleton).
12 de nov. de 2009 · Visually arresting, hazardous to swimmers, and—to some cultures—delicious, sea urchins are also revealing new information to the scientists who study them. Here, red sea urchins carpet a kelp...
Everything you should know about the Sea Urchin. The Sea Urchin is a colorful sea creature that resembles a pincushin filled with needles.
The most easily recognisable sea urchins are round, often brightly coloured and covered in sharp-looking spines. In fact, ‘urchin’ comes from an old word for hedgehog owing to their similar-looking spiky armour. However, there are more than 1,000 species of sea urchin, with varying characteristics.
