Do cells divide all the time

Yeah

Explanation:

Before a cell starts dividing, it is in the "Interphase." It seems that cells must be constantly dividing, but each cell actually spends most of its time in the interphase

as in mitosis, dna replication occurs during interphase.   in meiosis, it occurs specifically in s phase of interphase 1.

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.