While the number of cells in plants and animals varies from species to species, humans contain more than 10 trillion (10 13) cells. Most plant and animal cells are visible only under a microscope, with dimensions between 1 and 100 micrometres.
Owner of Jones Mineral Cabinet, Geology and Paleontology Supervisor, interested in Earth and Planetary sciences. Anthracite is a metamorphic rock commonly called coal ,whose protolith or parent rock is bituminous coal.ituminous coal is a sedimentary rock. Anthracite coal is considered a metamorphic rock. 5 people found this useful. Edit. Share to: 1  The Periodic Table of Elements Life is sustained by a number of chemical elements.
Gneiss and schist are the most common metamorphic rock. Gneiss is a  foliated rock usually composed of quartzand feldspar. Schist is  also foliated, but its minera compositi â¦ on varies.o. Gneiss is a high-grade metamorphic rock. Even if the gneiss  formed from what was originally a fossil-containing rock, the  metamorphism will have destroyed the fossils.