What evidence would have been needed to refute the theory of gravity before it was proven to be law? HELP

In 1915, Albert Einstein put forth a new alternative theory of gravity: General Relativity. The way to test it against Newton's theory was to wait for a total solar eclipse. 100 years ago, Einstein was proven right. I hope that this helps you. :)

we need to know the time interval during which the force acts. impulse of force = momentum change

multiple allele inheritance is traits controlled by more than 2 alleles (ex: pigeons having 3 alleles of one gene govern their feather color).