The Indian species of $Spirogyra$ in which Prof. Iyengar discovered direct lateral conjugation is:

Which class of algae reproduces asexually by non-motile spores and sexually by non-motile gametes?

The most common asexual structure produced in algae is:

The major pigments in Phaeophyceae are .....

An alga which exhibits a diplontic life cycle is

Read carefully the given statements about algae and choose the correct option.
$I$. The plant body is thalloid.
$II$. Mainly aquatic.
$III$. Reproduction takes place by vegetative,asexual,and sexual methods.
$IV$. Volvox and Ulothrix are the colonial forms of algae.