If a typical animal cell contains 2m of DNA, and is the size of roughly a strand of human hair, how is all of that material squeezed into an even tinier compartment (the nucleus)

DNA is tightly packaged by histone proteins

Explanation:

Deoxyribonucleic acid (DNA) is a negatively charged molecule packaged into the cell nucleus by means of positively-charged proteins, thereby forming a nucleoprotein complex. In the first place, DNA is wrapped around dimers of four core histone proteins (H2A, H2B, H3, and H4 ), thereby forming nucleosomes consisting of histone octamers and 146 bp of lineal DNA. The nucleosome represents the basic unit of the chromatin organization. Subsequently, the nucleosomes are arranged into 30-nanometer (nm) chromatin fibers, which are then organized into higher loops (300 nm). During the cell division cycle, these higher-order chromatin loops are supercoiled into chromatids (700 nm) and chromosomes (1400 nm).

there are mainly three domains in biological classification namely; archaea, bacteria, and eukarya.

archaea includes all the prokaryotic cells which are characterized by their lipid membranes. they have branched hydrocarbon which is attached to glycerol through an ether linkage.

bacteria includes all the prokaryotic cells, the cell membrane of which are made up of the unbranched fatty acid chain. in addition, they are attached to glycerol through an ester bond.

eukarya includes all the eukaryotic cells, that is, the cells contain a nucleus and other membrane-bound cell organelles.

they can be autotrophic as well as heterotrophic, unicellular as well as multicellular

they include kingdoms like protista, plantae, animalia, fungi et cetera.

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