I think so it is molecules
Glucose, which is their natural sugars that they feed themselves with to grow and reproduce properly. also, oxygen is a by-product of the equation.
D.
The farmer will choose what traits are most desirable. Basically, its like an arranged marriage. If you are the animal, and your father is the farmer, your father is picking who you marry. So the farmer just chooses who mates with who.
Phase 1 of the creation of life on earth was that life on earth was from nothing. Small molecules were formed from atoms of carbon and hydrogen. Earth does not have any oxygen rather it contains CO2, methane, nitrogen, hydrogen and ammonia where they were from the eruptions of volcanoes.
In a way yes but in a way no hope i answerd your question