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 algae are single celled plant-like protists and the protozoans are single celled animal-like protists. Remember, the Protists are neither animals or plants but in a Kingdom of their own!. Protozoans are further classified according to how they move and there are four types.hylum Mastigophora: These protists move with a whip like extension.called a flagella. The flagella is a long fibril that is spirally wound and beats or rotates in the water to move the protozoan about. Included in this group is the Peranema (shown at left), the Euglena and the Volvox.