Algae have cell wall made up of (1) Cellulose, hemicellulose and pectin (2) Cellulose, galectins and mannans (3) Hemicellulose, pectin and proteins (4) Pectin, cellulose and proteins.

Answer: The name “alga” refers to a broad and immensely varied collection of photosynthetic eukaryotic life forms. These creatures are not related since they do not have a common ancestor (polyphyletic).

Algae have cellulose, Galatians, & mannans in their cell walls.

Plants, like algae, have cell walls made up of polysaccharide like cell wall or a variety of glycoproteins, or both.

Algal taxonomy frequently relies on the existence of extra polysaccharides in cell walls. Microfibrils of a Mananas type may be found in cell walls of a range of marine green algae, including those of the genera Codium & Acetabularia, as well as in the wall of some red algae, such as Porphyra.

The cell wall of bacteria is made up of peptidoglycan.

Therefore, the answer is- Cellulose, galactans and mannans