Which of the following is observed in the adu | vedclass

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(B) In the animal kingdom,$Cnidaria$ (coelenterates) typically exhibit radial symmetry in their adult form. Similarly,$Echinodermata$ (adults) also ex

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Radial symmetry

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(B) In the animal kingdom,$Cnidaria$ (coelenterates) typically exhibit radial symmetry in their adult form. Similarly,$Echinodermata$ (adults) also exhibit radial symmetry (specifically pentamerous radial symmetry),although their larvae exhibit bilateral symmetry. Therefore,radial symmetry is the characteristic feature observed in the adult stage of both phyla.

$(a)$ $6-15$ pairs of gill slits	$(i)$ $Trygon$
$(b)$ Heterocercal caudal fin	$(ii)$ $Petromyzon$
$(c)$ Air bladder	$(iii)$ $Chondrichthyes$
$(d)$ Poison sting	$(iv)$ $Osteichthyes$

Which of the following is observed in the adult stage of $Cnidaria$ and $Echinodermata$?

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Which of the following organisms possess a four-chambered heart?

Match the following columns and select the correct option:

$(a)$ $6-15$ pairs of gill slits $(i)$ $Trygon$

$(b)$ Heterocercal caudal fin $(ii)$ $Petromyzon$

$(c)$ Air bladder $(iii)$ $Chondrichthyes$

$(d)$ Poison sting $(iv)$ $Osteichthyes$

$(a)\quad (b)\quad (c)\quad (d)$

Trochophore larva occurs in

Which of the following statements is correct?

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