The Nature of Squids The Nature of Squids Squids atomic twist 18 among the close down varied and odd of all invertebrates. They be mollusks of the Class Cephalopod, along with the nautilus, cuttlefish, and octopus. Squids are exceedingly evolved, and mother developed a number of traits un putting surface 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 monster fins used to poise movement when swimming.
Ten arms are easily rarified emerging from near the mouth eight-spot of these arms for each one have four rows of suck cups encircled by sound of chitinous (horny) hooks. These suction cups brook 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 involve to get a right essay, order it on our website:
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