The cell membrane is built of a double layer of .

According to theories of how life began, how did early organic molecules begin to separate from the outside world? a: specialized enzymes were required b: chains of amino acids created a barrier c: formation of microspheres or vesicles d: rna catalyzed the formation of membranes

Which molecule is called "molecule of hereditary?

How did the southern eastern united states drought affect the bottling operations of pepsi and coca cola?