Life is a way of protein, and its boundary is a phospholipid membrane. The membrane has unique properties that make the content of the cells is not leaking out, but only slightly through the bottom and slightly outwards. Life is indeed a fluid spill inwards and outwards. Thanks phospholipids. This phospholipid is considered to be essential for these unique properties.

Then someone had the check, as it is in those places Ocean, where the phosphorus is not so much.

They discovered that the plankton cell membranes contained about four times more substitute lipids than phospholipids. These substitute lipids are the norm rather than the exception in the world’s oceans, most of which have scanty supplies of phosphorus, Van Mooy says: “70 percent of the world is covered in water; in those areas, substitute lipids are dominant.”

Rewrite the textbooks: A new type of cell membrane : Scientific American Blog

However, it us to be? That said some weird substitute lipids. You know, even I would not wonder if we were directly under the nose life evolved under quite different scheme than the one in which chemical the human body works.

For you to introduce yourself, such Darvin’s two trees in one area of life. Not next to each other, if confesseth two different philosophical principles of life (eg in the form of various religions), as would appear, if the Earth were the two bio-chemically different forms of life?