Fractal courtesy of J.C. Sprott, Professor of Physics <http://sprott.physics.wise.edu>
God has a single design for the whole universe from its beginning to its end. Within this single design matter and life are intertwined so that various grasses and plants bearing seeds and fruits emerged from the planet surface along with man, and God "knows" every single plant that which sprouts on earth and how man would used it.
It appears that wild wheat called einkorn grew in Mesopotamia 10,000 years ago. "The transition to modern wheat, whose naked seeds remain attached to the stem, took place through chance hybridizations. These occurred between einkorn and other wild grasses in the Fertile Crescent." (Webpage: The origins of our Daily Bread) Now wheat in its developed form has become the most cultivated grain on earth giving up its germ of life and sustenance for the life of mankind.
According to most historians leavened bread was discovered by accident in Egypt sometimes between 3,000-2,000 B.C. One day a housewife left her bread dough too long in the sun and it fermented. When she baked it she got leavened bread. In time, the Egyptians used a portion of the leavened dough to start a new batch of dough thus shortening the time it took to ferment it.
Now we know that yeast, a microscopic fungi, found in the soil, leaves, air, etc. is responsible for this process. Yeast feeds on the starch of bread producing alcohol and carbon dioxide. During baking, alcohol evaporates but packets of air remain in the bread making it soft.
The Eastern Church uses leavened bread for its Mass Sacrifice because it symbolizes the resurrection of Christ while the Roman Church uses unleavened bread thus recalling the Jewish Passover when they left Egypt in a hurry --they had no time to make leavened bread. "Since the dough they had brought out of Egypt was not leavened, they baked it into unleavened loaves. They had been rushed out of Egypt and had no opportunity even to prepare food for the journey." (Ex 12:39)
We recall the above at at Mass in our offering of bread as we pray:
"Blessed are you, Lord, God of all creation.
Through your goodness we have this bread to offer,
which earth has given
and human hands have made.
It will become for us the bread of life."
Origin of Wine