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While sampling marine plankton in a lab, a student encounters large numbers of fertilized eggs. The student rears some of the eggs in the laboratory for further study and finds that the blastopore becomes the mouth. The embryo develops into a trochophore larva and eventually has a coelom and a hemocoel. To which group of organisms did these eggs likely belong?.

Answer :

These eggs most likely to belong the group of mollusca.

What are mollusca?

Mollusk, additionally spelled mollusc, any tender-bodied invertebrate of the phylum Mollusca, generally absolutely or in part enclosed in a calcium carbonate shell secreted via way of means of a tender mantle overlaying the body. Along with the bugs and vertebrates, it's far one of the maximum various agencies within the animal kingdom, with almost 100,000 (probably as many as 150,000) defined species. Each institution consists of an ecologically and structurally huge style of forms: the shell-much less Caudofoveata; the narrow-footed gliders (Solenogastres); the serially valved chitons (Placophora or Polyplacophora); the cap-fashioned neopilinids (Monoplacophora); the limpets, snails, and slugs (Gastropoda); the clams, mussels, scallops, oysters, shipworms, and cockles (Bivalvia); the tubiform to barrel-fashioned tusk shells (Scaphopoda); and the nautiluses, cuttlefishes, squids, and octopuses (Cephalopoda).

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