A: In Fucus,the sporophytic phase is limited | vedclass

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(D) $Fucus$ is a brown alga that exhibits a diplontic life cycle.In a diplontic life cycle,the diploid sporophyte is the dominant,photosynthetic,and i

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$A$ is false and $R$ is true.

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(D) $Fucus$ is a brown alga that exhibits a diplontic life cycle.In a diplontic life cycle,the diploid sporophyte is the dominant,photosynthetic,and independent phase of the plant.The gametophytic phase is represented by the single to few-celled gametophytes.However,the statement $A$ is true because the zygote is the only diploid stage in the life cycle of many algae,but specifically for $Fucus$,the entire plant body is diploid $(2n)$.Wait,let us re-evaluate: $Fucus$ is strictly diplontic,meaning the vegetative plant body is diploid $(2n)$. Therefore,the sporophytic phase is $NOT$ limited to the zygote; it is the dominant phase.Thus,$A$ is false and $R$ is false because the sporophyte is independent but the zygote is not the only sporophytic stage.Actually,in $Fucus$,the plant body is diploid,so the sporophyte is the dominant phase. Therefore,$A$ is false. $R$ is also false because the sporophyte is not just the zygote,and the zygote itself is not photosynthetic.

$A$: In $Fucus$,the sporophytic phase is limited to the zygote only.
$R$: In $Fucus$,the sporophytic phase is photosynthetic and independent.

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$A$: In $Fucus$,the sporophytic phase is limited to the zygote only.$R$: In $Fucus$,the sporophytic phase is photosynthetic and independent.