The three types of symbiosis are ___ and ___

Adialysis unit requires 78.5 l of water.the estimated digit is 5. 

The answer to the question: choose the correct statement.  a) when ethane reacts with fluorine gas the product is less stable.b) addition reactions of unsaturated hydrocarbons and halogens requires a high activation energy.  c)the double covalent bond within unsaturated hydrocarbons requires a lot of energy to break.  d)the double covalent bond within unsaturated hydrocarbons can be broken easily.is: a) when ethane reacts with fluorine gas the product is less stable.

When china's civil war resumed, the nationalists held an advantage because the nationalist had more soldiers  than the communist.