Explanation: Ascidiacea belongs to the phylum Chordates. They are characterized by outer hard covering known as tunic which is made up of polysaccharide cellulose.
They are found all over the world, usually in the shallow water. They are sac like marine animals. They are invertebrates having almost 2300 species.
It is found in cellular structures in certain plant cells. These are usually found in the leaves of plants. It is the chlorophyll in the leaves of plants that gives them their green color.