OESOPHAGUS STOMACH
ECHINODERMS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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single-shelled mollusks, snails and whelks
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oysters, clams and scallops
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octopuses, squid and clams
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all of the above.
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Detailed explanation-1: -Gastropods are a highly diverse Class of molluscs that include limpets, whelks, periwinkles, abalones, venomous cone shell s, and the shell-less nudibranchs, sea slugs and sea hares.
Detailed explanation-2: -Class Gastropoda – snails, slugs, limpets, whelks, conchs, periwinkles, etc.
Detailed explanation-3: -Most gastropods have a single shell, but many have no shell at all. Their shells have left behind an abundant Cambrian to Recent (i.e., today) fossil record that has been the focus of many paleobiological studies.
Detailed explanation-4: -Gastropods typically have a large foot with a flat sole for crawling, a single coiled shell that covers the soft body, and a head that bears a pair of eyes and tentacles. However, they are so diverse that some forms lack shells, while animals in one genus have shells with two halves, like bivalves.
Detailed explanation-5: -Bivalves are mollusks with two shells such as clams and oysters. Univalves are animals with one shell such as a snail.