What is it called when a cell has two copies of each chromosome. in short sentence

Which best describes the scientific process

How are rocks that cooled within magma chambers found on earth’s surface today? they are pushed up by magma under earth’s surface. they are revealed by erosion of earth’s surface over time. they are pushed to earth’s surface because of their larger size. they are revealed at earth’s surface due to their low density.

The mitochondrion functions lipid storage protein synthesis photosynthesis dna replication atp synthesis