What molecule forms the cell membrane? proteins carbohydrates nucleic acids phospholipids

The right answer is phospholipids.

Phospholipids are the essential constituents of cell membranes where, with cholesterol molecules, they are organized into a lipid bilayer in which the hydrophobic tails are oriented towards the interior of the structure whereas the polar heads form the two surfaces of the bilayer .

It is the basis of living structures, which are always organized from a cell membrane separating the inside of the cell from the outside environment. Internal membranes can define inner compartments within eukaryotic cells - called organelles - such as mitochondria, chloroplasts, one (or more) nucleus (x), an endoplasmic reticulum, the Golgi apparatus, and so on.

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explanation:

for  example, forests have higher evapotranspiration than other ecosystems,  such  as grasslands, because of their deeper roots and greater leaf area. thus forests have a net moistening effect on the atmosphere and become a moisture source for downwind ecosystems.