A: Annelids,arthropods,and molluscs are proto | vedclass

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Question

(B) Assertion is true: Annelids,arthropods,and molluscs are indeed protostomial coelomates,meaning the blastopore develops into the mouth during embry

Vedclass · Accepted Answer

Assertion and Reason both are correct but Reason is not the correct explanation of Assertion.

Vedclass · Answer

(B) Assertion is true: Annelids,arthropods,and molluscs are indeed protostomial coelomates,meaning the blastopore develops into the mouth during embryonic development.Reason is also true: Members of these three phyla exhibit bilateral symmetry and possess a true coelom (eucoelomates).However,the fact that they have bilateral symmetry and a true coelom does not explain why they are classified as protostomes. Therefore,the Reason is not the correct explanation for the Assertion.

Column $I$	Column $II$
$(A)$ Limbless reptile	$(i)$ Lamprey
$(B)$ Jawless vertebrate	$(ii)$ Salamander
$(C)$ Amphibian	$(iii)$ Snake
$(D)$ Cartilaginous fish	$(iv)$ Shark
$(E)$ Flightless bird	$(v)$ Ostrich

Characteristic	Cyclostomata	Chondrichthyes	Osteichthyes
$(i)$ Habitat	Marine	Marine	Marine,Fresh Water
(ii) Mouth	Sucking mouth	Ventral mouth	Terminal mouth
(iii) Gill Slits	$6-15$ Pairs	$5-7$ Pairs	$4$ Pairs
(iv) Scales	Absent	Placoid	Cycloid/Ctenoid
$(v)$ Fins	Unpaired	Paired	Paired

Column $-I$	Column $-II$
$(A)$ Cartilaginous fishes	$(i)$ Cycloid scales
$(B)$ Bony fishes	$(ii)$ Epidermal scales
$(C)$ Reptiles	$(iii)$ Placoid scales

$A$: Annelids,arthropods,and molluscs are protostomial coelomates.
$R$: All three phyla include members with bilateral symmetry and a true coelom.

Similar Questions

Column $I$ Column $II$
$(A)$ Limbless reptile $(i)$ Lamprey
$(B)$ Jawless vertebrate $(ii)$ Salamander
$(C)$ Amphibian $(iii)$ Snake
$(D)$ Cartilaginous fish $(iv)$ Shark
$(E)$ Flightless bird $(v)$ Ostrich
Match items in column $I$ with those given in column $II$.

Which one of the following is a matching set of animals belonging to the same phylum?

Column $-I$ represents the animal class, while Column $-II$ represents the exoskeleton. Choose the correct option:
Column $-I$ Column $-II$
$(A)$ Cartilaginous fishes $(i)$ Cycloid scales
$(B)$ Bony fishes $(ii)$ Epidermal scales
$(C)$ Reptiles $(iii)$ Placoid scales

Which of the following is a correctly matched pair?

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$A$: Annelids,arthropods,and molluscs are protostomial coelomates.$R$: All three phyla include members with bilateral symmetry and a true coelom.