Opal is a unique gemstone that often displays a beautiful play-of-color. Opal exhibits all colors and both light and dark base colors that reflect a rainbow-like display of multiple colors when viewed from different angles (play-of-color). On Mohs' scale of hardness, opal ranks 5.5 to 6.5.
Most protozoa are animal-like (heterotrophic) because their carbon and energy must be obtained by eating or absorbing organic compounds originating from other living organisms. As eukaryotes they have several organelles, including at least one nucleus that contains most of the cell's deoxyribonucleic acid.Source(s):ost protozoa are animal-like (heterotrophic) because their carbon and energy must be obtained by eating or absorbing organic compounds originating from other living organisms. As eukaryotes they have several organelles, including at least one nucleus that contains most of the cell's deoxyribonucleic acid. Source(s):
Protozoa is one of the main groups of the Kingdom: Protista, which consists of unicellular eukaryotic organisms of a diverse array. Protozoans include organisms related to both animals and plants. Therefore, they have been termed as either phylum or division.ajority of protozoans are motile; ciliates, flagellates, and amoeboids move using their cilia, flagella, or pseudopodia respectively. A significant portion of the protozoans being heterotrophic, they move energy into their consumers from bacteria and algal production.