Critical Thinking When a spherical cell increases in diameter from 2 um to 20 um, by what factor does its surface area change? By what factor does its volume change? (The surface area of a sphere
= 4n radius, and the volume of a sphere = 4/37 radius”. Remember that diameter = 2 x radius.)

i believe it is "they are not used up by reactions" as the answer to your question, text me back if this is correct because i just learned this.

age range would be the answer

the correct answer is 4) heat and pressure

metamorphic rocks arise from transformation of existing rocks types, in a process called metamorphism. during metamorphism the original rock(prolith) change into metamorphic rock by heating (150-200c) and pressure of more than 1000 bar. the original rock can be sedimentary, igneous, or existing metamorphic rock.