The main purpose of the interruption of projections is

The main purpose of the interruption of projections is to show and divide the continents area -wise with equal area interpretation and less distortion. Distortions are very common errors to appear as earth cannot be represented as flat bed.

The projector's property of equal-area makes it useful for presenting spatial distribution of phenomena.

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

igneous rocks are formed by solidification of cooled magma (molten rock), with or without crystallization, either below the surface as intrusive (plutonic) rocks or on the surface as extrusive (volcanic) rocks.  

the composition depends on the source magma. there are almost a thousand types of composition found till now.  

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