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):
Heterotrophic protista. These Protista are also known as Protozoa, which means âfirst animalsâ; in fact, the term does not mean that all protozoa are the ancestors of the animals, but refers to the fact that they ingest food, which is typical of animals. Amoeboid protozoa: they move with the aid of the pseudopodia, which means âfalse feetâ, i.e. extensions of the cellular cytoplasm that allow the cell to move. The pseudopodia are also used to take in the food particles by phagocytosis (absorption of particles by a cell).