Choose the incorrect statement with respect to phaeophyceae of algae.
Dictyota has dichotomously branched plant body.
Fucus has diplontic life cycle.
Cell wall has outer algin and inner cellulose layers.
Sexual reproduction takes place by only oogamy.
In brown algae sexual reproduction takes place usually by oogamy. In species of Ectocarpus, isogamy and anisogamy are seen.