I find it interesting that nowhere does Genesis mention bacteria, considering it was the dominant life form for the vast majority of the Earth's history, and existed long before land-based plants.
It's not that hard to understand. The authors had no idea, experience or idea that microscopic life existed, so it's not surprising they are not mentioned.
Time is just a property of the universe, a dimention like height or width. How do you "Cause" height or width to exist? How do you exist outside of space and time and retain the ability to influence it? By definition, if something is outside of space and time it does not exist.
relative to those who do exist within space/time. But by definition GOD is that which is the superset that includes our universe and space/time.