The term "" refers to a group of elements called lanthanides and actinides that are not often found in large, commercially valuable quantities. A) special earthsB) restricted mineralsC) rare earthsD) earth obscuresE) nonelastic minerals

in chemistry, a solution’s concentration is how much of a dissolvable substance, known as a solute, is mixed with another substance, called the solvent. the standard formula is c = m/v, where c is the concentration, m is the mass of the solute dissolved, and v is the total volume

answer: they produce more slow than unicellular organisms.