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):
The many-celled algae are seaweed while the single-cell algae are called phytoplankton. 1. phytoplankton = single-celled algae that float near the surface of the water; they are an important part of the food chain and produce a lot of oxygen which is released into the atmosphere.. Animal-like Protists 1. protozoa (singular: protozoan) = single-celled, animal-like protists. 2. Protozoa can live in water environments and in soil. 3. They are heterotrophs and can eat by capturing living organisms, feeding on dead things (saprophytes), or as a parasite in another living organism (in a host).