<span>simple organic molecules can form spontaneously under conditions like those thought to prevail early in Earth's history</span>
Is the letter D because your having half of their DNA. That's why your mother is contributing the Y chromosome and your father is contributing the X chromosome
The answer would be fossils since they are they remains of past life forms
Liquid.
Earth can sustain life because it contains liquid water.
The answer to the question above is letter a. melting.
>Exothermic is the giving off heat energy the transfer of energy to the surroundings.
>In exothermic reaction, the energy is
usually transferred as heat energy
<span>> Other example of exothermic is combustion</span>
