Question

what would happen if a better theory to explain changes in organisms was presented?the original theory would still stand.the new theory would replace the old one.it would be ignored.

Explanation:

In the field of natural science (specifically biology which deals with organisms), scientific theories are subject to change. A better - explained theory (with more evidence, better predictive power etc.) would replace the old one. This is in line with the scientific method where theories are refined or replaced as new and better - supported ideas emerge.

Answer:

The new theory would replace the old one.