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.
Marble and slate are examples of metamorphic rock. Metamorphic rock is formed under extreme pressure combined with heat over time. Metamorphic rocks are so called because they always begin as another type of rock. When slate forms, some of the clay from the original rock is replaced by the mineral mica.arble is a type of metamorphic rock that originates from limestone. Schist is a type of metamorphic rock that can originate from slate which is another type of metamorphic rock. The word metamorphic literally means changed form. Slate, a metamorphic rock, can form from shale, clay or mudstone.