NEET BIOLOGY

Detailed explanation-1: -Like most (but not all) brown algae, Fucus is a large, multicellular organism that well-adapted to life in intertidal and shallow coastal waters, most commonly in relatively cool waters.

Detailed explanation-2: -Kelps (brown algae) are the only multicellular protists. Protist (biology definition): Any of a group of eukaryotic organisms belonging to the Kingdom Protista. Protists include: (1) protozoa, the animal-like protists, (2) algae, the plant-like protists, and (3) slime molds and water molds, the fungus-like protists.

Detailed explanation-3: -Fucus, also called rockweed, genus of brown algae, common on rocky seacoasts and in salt marshes of northern temperate regions. Fucus species, along with other kelp, are an important source of alginates-colloidal extracts with many industrial uses similar to those of agar.

Detailed explanation-4: -Protists vary greatly in organization. Some are single-celled; others are syncytial (coenocytic; essentially a mass of cytoplasm); and still others are multicellular.