Why do the phospholipid surrounding the cell form a bilayer

 because the properties of polar heads and nonpolar tails cause the phospholipids to arrange themselves in layers. ... Some proteins extend through one or both phospholipid layers and help materials cross the membrane.

Explanation:

in situ hybridization has been widely used for research applications, including clinical cytogenetics, gene mapping, tumor biology and studies of chromosome evolution.

hi, natural selection of the peppered moth during the industrial revolution in 19th-century england is an example of an outlier in the study of evolution. during this time, pollution from factories filled the forests, coating trees in a layer of soot—turning white trees black

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