â¢ Medium-grained (1/16 mm to 2 mm) rocks are usually called sandstone. Medium-grained rocks can be composed of quartz grains, feldspar grains (arkose), or rock fragments and clay (graywacke). Sandstone (Photograph by Parvinder Sethi). Medium-sized grains in clastic sedimentary rocks form sandstone. This sample is a quartz sandstone.
Eukaryotes are those organisms in which the cell body contains a nucleus whereas prokaryotes are those organisms in which the cell body does not contain a nucleus. In amoeba, the reproduction is carried out under the instruction of the nucleus thus making it a eukaryote organism.
Best Answer: mRNA is made in the nucleus of eukaryotic cells. Since prokaryotic cells do not have a nucleus the mRNA is made directly off of the DNA in the cell's cytoplasm.Extra info: Eukaryotic organisms include the protists, animals, plants, and fungi. Prokaryotic cells include the bacteria and archaea.Source(s): Have a biology bachelors degree.ince prokaryotic cells do not have a nucleus the mRNA is made directly off of the DNA in the cell's cytoplasm. Extra info: Eukaryotic organisms include the protists, animals, plants, and fungi. Prokaryotic cells include the bacteria and archaea. Source(s): Have a biology bachelors degree.