NEET BIOLOGY

Detailed explanation-1: -Kelps and brown “algae" The largest of the chromists are the Phaeophyta, the brown algae–the largest brown algae may reach over 30 meters in length. The rockweed shown at left, Fucus distichous, visible at low tide at the Berkeley Marina in California, is somewhat smaller. Almost all phaeophytes are marine.

Detailed explanation-2: -Brown Algae. Phaeophyceae or brown algae are distinguished by chloroplasts that have four surrounding membranes, thylakoids in stacks of three, fucoxanthin that masks chlorophyll-a and-c, laminarin as the photosynthetic reserve, and alginates commonly as the wall matrix component.