The only extant cephalopod that produces an external shell is the chambered nautilus. The shells produced by squid and cuttlefish are internal.
The nautilus is the only living cephalopod with a natural, external shell.
Chambered Nautilus
NAUTILUS
A chambered shell
cuttle fish
Yes, an octopus is an cephalopod which means head foot. Other cephalopods include cuttlefish, squid, and an nautilus which is the only cephalopod that still carries a shell.
The only difference is the colour of the external shell.
Alkali metal have only one electron on the external shell; the are very reactive and form cations.
No - squids and reptiles belong in completely different groups of the animal kingdom. Squid, cuttlefish, and octopus belong to a phylum called cephalopod mollusks.
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A squid is a cephalopod, and has no skeleton at all. The only hard part of a squid is its beak.
Yes. The only known cephalopod with poisonous flesh is the flamboyant cuttlefish.
no;snails have shells, Slugs do not!more specifically snails are almost all members of the molluscan class Gastropoda with a external shell. Slugs on the other hand are also all member of the molluscan class gastropoda, but do not have an external shell rather an internal shell.
Molluscaanswer 2 Well, we do not know that the Molluscal developed the shell to protect its internal organs, we only know that by developing an external shell, that did protect its internal organs.But the shell gave it more than that. The animal now had a frame onto which it could anchor its organs, and thus use superior locomotion or feeding. And in our human case, a skeleton that enables and protects all sorts of things.The shell was not an essential for protection; for ordinary garden snails, and squids and octopuses [[one puss, 2 puses in English] have all let their shell degenerate to a minor internal feature.
no only 2 in the first shell, 8 in every other shell