Which situation would result in a theory being replaced rather than revised?

Adigestive system that is a series of tubes beginning at the mouth and ending at the anus is a digestive system.

Give two examples of what would occur if one of the pairs did not match or had an extra chromosomes. explain how this might occur, and if it would be dangerous to the individual. fast.

Which short-term environmental changes would a very small asteroid or comet impact on earth most likely cause? check all that apply. flooding extinction craters on surface changes in weather patterns death of organisms and populations