Do you think that the scientific investigations can follow more than one method?

Compare the depth of field when focusing with low power and high power. which power has the greater depth of field?

Why is the theory of evolution important? it disproves all other theories about how life began. it provides a topic for debate. it is a unifying concept in biology. it explains how life began. i know for sure, it is not "it is a unifying concept in biology."

How can an organ, such as the lungs, work for multiple body systems?