Oxygen is the common characteristic which helps fire to burn and a flowering plant to live on earth. When oxygen combines with a suitable chemical, it releases energy in the form of heat.
I'm not completely sure, but I'm fairly certain that the answer is B.
The membrane is selectively permeable because substances do not cross it indiscriminately. Some molecules, such as hydrocarbons and oxygen can cross the membrane. Many large molecules (such as glucose and other sugars) cannot. Water can pass through between the lipids.
