Answer:
a) two/ darwinian and mass
The basic structure of a cell membrane is formed by phospholipids, or the lipid bi-layer.
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The right answers are mentioned in the picture.
Energy means an ability to act in any mode: to move, heat, compress, illuminate, sound, transmit information, etc.
Today the energy usable by man comes in many forms:
Gravitational energy
Kinetic energy including wind energy
Thermal or caloric energy
Radiative energy including solar energy
Chemical energy including fossil energies
Electric energy
Nuclear energy