Algae are aquatic and also found in moist rocks and soil surface. The plant body is thallus does not differenciate into root, stem and leaves. In higher algae, plant body is differenciate into holdfast stipe and lamina.They are non-vascular plant. The mechanical tissue are absent in all forms of algae. The result food material is in the form of starch.The algae synthesized food during photosynthesis. The cell wall is made up of cellulose and other substance. They contain chlorophyll in the form chlorophyll A, Chlorophyll B, Xan chlorophyll, pphycobilins and some amount of carotenes.
They are preprodused by vegetative, asexual and sexual reproduction. Their embroyo stage is absent. They have mitochondria for cellular respiration and some have chloroplasts for photosynthesis. Nuclei of protists contain multiple DNA strands, the number of nucleotides are significantly less than complex eukaryotes. Movement is often by flagella or cilia.