Which invertebrate animals possess a calcium | vedclass

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Question

(B) The correct answer is $B$. $1$. Mollusca: Most mollusks have a hard shell made of calcium carbonate $(CaCO_3)$ which serves as an exoskeleton. $2$

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Mollusca-Porifera

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(B) The correct answer is $B$. $1$. Mollusca: Most mollusks have a hard shell made of calcium carbonate $(CaCO_3)$ which serves as an exoskeleton. $2$. Porifera: Many sponges (Porifera) possess spicules made of calcium carbonate or silica,which form their internal skeletal framework. $3$. Arthropoda have an exoskeleton made of chitin. $4$. Annelida generally lack a hard mineralized skeleton.

Column $-I$	Column $-II$
$(A)$ Porifera	$(i)$ Tornaria larva
$(B)$ Hemichordata	$(ii)$ Free-swimming larva
$(C)$ Cnidaria	$(iii)$ Parenchymula larva
$(D)$ Echinodermata	$(iv)$ Planula larva

Which invertebrate animals possess a calcium carbonate skeleton?

Similar Questions

Which of the following differences between Chondrichthyes (cartilaginous fishes) and Osteichthyes (bony fishes) is incorrect?

Column $-I$ represents the phylum and Column $-II$ represents the larval stage. Select the correct option:
Column $-I$ Column $-II$
$(A)$ Porifera $(i)$ Tornaria larva
$(B)$ Hemichordata $(ii)$ Free-swimming larva
$(C)$ Cnidaria $(iii)$ Parenchymula larva
$(D)$ Echinodermata $(iv)$ Planula larva

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Which of the following is the correct matching of an animal,its characteristics,and its taxon?

Which of the following is an oviparous animal with a four-chambered heart?

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