What does the protoplast of brown algae contain?

Step-by-step solution

The members of phaeophyceae or brown algae are found primarily in marine habitats. They show great variation in size and form. They range from simple branched, filamentous forms (Ectocarpus) to profusely branched forms as represented by kelps, which may reach a height of 100 meters. They possess chlorophyll a, c, carotenoids and xanthophylls. They vary in color from olive green to various shades of brown depending upon the amount of the xanthophyll pigment, fucoxanthin present in them. Food is stored as complex car