It's a region of DNA that binds DNA Polymerase to begin replication.
Answer:
The black and yellow bird population would begin to starve and would be forced to find alternative food, or die off. This would then send ripples through the food web, causing almost every species to be effected by the grasshoppers being gone.
Because you cannot test it or observe it.
A scientific theory are created through the scientific method, in the scientific method you need to be able observe it and experiment.
Answer:
Letter a amount of genetically modified organisms
He offered him a chance to learn how to write. :3 Hope this helped