A : Sexual reproduction shows considerable va | vedclass

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(A) In $Chlorophyceae$ (green algae),sexual reproduction exhibits significant diversity. It can occur through the fusion of gametes that are similar i

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Assertion and Reason both are correct and Reason is the correct explanation of Assertion.

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(A) In $Chlorophyceae$ (green algae),sexual reproduction exhibits significant diversity. It can occur through the fusion of gametes that are similar in size (isogamous),dissimilar in size (anisogamous),or through the fusion of a large non-motile female gamete and a smaller motile male gamete (oogamous). Since the variation in the type and formation of sex cells is directly explained by the occurrence of these three modes of reproduction,the Reason correctly explains the Assertion.

Column-$I$	Column-$II$
$P$. Unicellular	$I$. Volvox
$Q$. Colonial	$II$. Chlamydomonas
$R$. Filamentous	$III$. Ulothrix and Spirogyra
$S$. Massive plant body	$IV$. Kelp

$A$ : Sexual reproduction shows considerable variation in the type and formation of sex cells in members of $Chlorophyceae$.
$R$ : It may be isogamous,anisogamous and oogamous.

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Match the following columns:
Column-$I$ Column-$II$
$P$. Unicellular $I$. Volvox
$Q$. Colonial $II$. Chlamydomonas
$R$. Filamentous $III$. Ulothrix and Spirogyra
$S$. Massive plant body $IV$. Kelp

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$A$ : Sexual reproduction shows considerable variation in the type and formation of sex cells in members of $Chlorophyceae$.$R$ : It may be isogamous,anisogamous and oogamous.