S - Statement: The presence of cnidoblasts is | vedclass

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(B) The statement $S$ is true because cnidoblasts (or stinging cells) are indeed a unique and defining characteristic of the phylum Cnidaria,used for

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$S$ and $R$ are both true,but $R$ is not the correct explanation of $S$.

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(B) The statement $S$ is true because cnidoblasts (or stinging cells) are indeed a unique and defining characteristic of the phylum Cnidaria,used for anchorage,defense,and capturing prey.The reason $R$ is also true because sponges (phylum Porifera) exhibit specific larval stages such as amphiblastula or parenchymula during their life cycle.However,the presence of specific larvae in sponges does not explain why cnidoblasts are present in Cnidarians. These are two independent biological facts belonging to different phyla. Therefore,$R$ is not the correct explanation for $S$.

$(1)$ Diploblastic	$(a)$ Protozoa to Echinodermata
$(2)$ Coelomate	$(b)$ Platyhelminthes to Chordata
$(3)$ Triploblastic	$(c)$ Coelenterata
$(4)$ Invertebrates	$(d)$ Annelida to Chordata

List $I$	List $II$
$A$. Pterophyllum	$I$. Hag fish
$B$. Myxine	$II$. Saw fish
$C$. Pristis	$III$. Angel fish
$D$. Exocoetus	$IV$. Flying fish

$S$ - Statement: The presence of cnidoblasts is a characteristic feature of Cnidarians.
$R$ - Reason: In sponges,amphiblastula or parenchymula larvae are observed.

Similar Questions

In which phylum is segmentation shown?

Which type of asexual reproduction is $NOT$ observed in organisms belonging to the phylum Protozoa?

Select the correct option for the following matches:
$(1)$ Diploblastic $(a)$ Protozoa to Echinodermata
$(2)$ Coelomate $(b)$ Platyhelminthes to Chordata
$(3)$ Triploblastic $(c)$ Coelenterata
$(4)$ Invertebrates $(d)$ Annelida to Chordata

In Mollusca, excretion occurs through $......$ and in Hemichordata, it occurs through $......$.

Match List $I$ with List $II$ :
List $I$ List $II$
$A$. Pterophyllum $I$. Hag fish
$B$. Myxine $II$. Saw fish
$C$. Pristis $III$. Angel fish
$D$. Exocoetus $IV$. Flying fish

Choose the correct answer from the options given below :

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$S$ - Statement: The presence of cnidoblasts is a characteristic feature of Cnidarians.$R$ - Reason: In sponges,amphiblastula or parenchymula larvae are observed.