Red algae generally do not produce $......$.

Which among the following do you consider as the best evidence to show that two species of algae are closely related?

Zygospore is

Which algae is likely to be found in the deepest water?

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

Cells of $Ulothrix$ are