NEET BIOLOGY

Detailed explanation-1: -the answer to the given question is number C. mollusk.

Detailed explanation-2: -Invertebrate Paleontology is the study of fossil animals that lack notochords (non-vertebrates).

Detailed explanation-3: -The invertebrate palaeontology collections contain around 350, 000 specimens, including over 1, 000 type specimens. They cover all the major phyla: sponges, corals, bryozoans, brachiopods, molluscs, arthropods, echinoderms and graptolites, as well as enigmatic organisms that are yet to be classified.

Detailed explanation-4: -Invertebrate Paleontology is the study of invertebrate animals of the geologic past. Invertebrates constitute about 95% of all living animal species; and, although they share the common negative characteristic of the lack of a backbone or vertebral column (cf.

Detailed explanation-5: -Fossil invertebrate animals (animals without backbones) are a wondrously diverse group with a fossil record spanning over 600 million years. Their abundance, diversity, and wide range of adaptations make them an ideal resource for scientists to use in understanding how our planet has changed over time.