This is the Classification of Hard-shelled Clam. Most of these creatures spends almost their entire lives buried in the sand except during their developing stages when they swim freely about their environment.
Bivalvia is a class of marine and freshwater molluscs with laterally compressed bodies enclosed by a shell in two hinged parts. This group displays a broad range of morphological features such as a muscular foot, a mantle and visceral mass containing internal organs. Members of class Monoplacophora (“bearing one plate”) posses a single, cap-like shell that encloses the body. They are mostly aquatic organisms.
Sense organs consist of eyes, osphradium, tentacles, and. Clam Dissection Questions Pre-lab: 1. Mollusca makes the second largest phylum of non-chordate animals including snails, octopuses, sea slugs, squid, and bivalves such as clams, oysters, and mussels. Class Aplacophora includes worm-like animals with no shell and a rudimentary body structure. amzn_assoc_tracking_id = "mywebsit03240-20"; In this case, the shell is a hard calcareous structure, made up of calcium carbonate.
Among all known marine species, 23% are mollusks. Explain your answer. While a clam does have major organs such as a heart and kidneys, it lacks eyes and a brain.
They are a small group of mollusks which contains about 320 species.
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Is a clam an invertebrate or vertebrate?
Most chiton species inhabit intertidal or subtidal zones, and do not extend beyond the photic zone. They have a bilaterally symmetrical body with a spiral or coiled shell. They display vivid coloration, typically seen in squids and octopi, which is used for camouflage. The gills have evolved into ctenidia, specialised organs for feeding and breathing. The foot is lobed and developed into tentacles and a funnel, which is used as the mode of locomotion. They have the ability to squirt ink during threatened.
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They are very small sized mollusks and their length ranges from 5 -30 cm. Cephalopods are a class of shell-bearing animals as well as mollusks with a reduced shell. amzn_assoc_placement = "adunit0";
They have a well-developed head. This class contains about more than 350 species. Members of class Monoplacophora have a single shell that encloses the body. The mantle cavity encloses the ctenidia (singluar: ctenidium) as well as a pair of nephridia (singular: nephridium). The mantle has siphonophores that facilitate exchange of water. They have a large pair of vertebrate like eyes. These animals do not possess eyes, but they have a radula, as well as a foot modified into tentacles with a bulbous end, known as captaculae. Members of class Polyplacophora are better known as “chitons;” these molluscs have a large foot on the ventral side and a shell composed of eight hard plates on the dorsal side. There are about 25 living species which all inhabit the deep sea between 175–6400 m depth ranges.
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