The Nature of Squids The Nature of Squids Squids atomic mo 18 among the fast varied and odd of all invertebrates. They be mollusks of the Class Cephalopod, along with the nautilus, cuttlefish, and octopus. Squids atomic number 18 exceedingly evolved, and let developed a number of traits un super C to most different mollusks. Fossil records of cephalopods have go out back the Welsh Period (about 600 million years ago). Structurally, squids have only tenuous variations of a basic theme common to all cephalopods. They are spherical or cigar-shaped with ogre fins used to poise movement when swimming.
Ten arms are easily rarified emerging from near the mouth cardinal of these arms for each one have four rows of sucking cups encircled by sound of chitinous (horny) hooks. These suction cups raise a means of attaching to rocks or holding its food with a powerful grip. The other two arms are called tentacles, and are contractile and longer than the other eight. These tentacles have spatulate ...If you necessity to get a right essay, order it on our website:
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