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Aristotle's lantern in a sea urchin, viewed in lateral section. The mouth of most sea urchins is made up of five calcium carbonate teeth or plates, with a fleshy, tongue-like structure within. The entire chewing organ is known as Aristotle's lantern from Aristotle's description in his History of Animals (translated by D'Arcy Thompson):
Aristotle’s lantern is a complex system of jaws and muscles which are capable of a variety of feeding types including suspension feeding, herbivory and detritivory feeding, and occasionally predation. Adaptations to this lantern have allowed sand dollars to live in habitats which have fine, shifting substrates.
The sea urchin is the first animal with a sequenced genome that (1) is a free-living, motile marine invertebrate; (2) has a bilaterally organized embryo but a radial adult body plan; (3) has the endoskeleton and water vascular system found only in echinoderms; and (4) has a nonadaptive immune system that is unique in the enormous complexity of ...
When will the geomagnetic storm occur? A storm watch is in effect for Dec. 31. CMEs travel several million miles per hour, so the NOAA predicts that the best time to see the lights would be ...
Drew lit up every room he entered. His smile was infectious. He had the best personality. We are such a tight family, dependent on each other, friends, family and neighbors. We cherish the 26 ...
Fox News host Sean Hannity gives his take on the White House's response to mysterious drone sightings in his opening monologue Monday on "Hannity." SEAN HANNITY: Now, if your government didn't ...
3. On the Sign On screen, click the small arrow pointing down to bring up a list of all stored usernames. 4. Select the desired username by clicking on it. Click Continue once you selected the username. 5. Once you click Continue a new window appears. Check if the correct username is displayed and click Continue. 6.
The works of Aristotle, sometimes referred to by modern scholars with the Latin phrase Corpus Aristotelicum, is the collection of Aristotle's works that have survived from antiquity. According to a distinction that originates with Aristotle himself, [citation needed] his writings are divisible into two groups: the "exoteric" and the "esoteric". [1]