Answer:
Primary sources can be described as those sources that are closest to the origin of the information.Secondary sources often use generalizations, analysis, interpretation, and synthesis of primary sources.
Explanation:
Answer:
first to the definition, spontaneous generation states that living things rise from non-living things. This experiment disprove the theory because when the beaker of meat was left open, flies came and left their eggs on it. And the one with closed beaker couldn't have those eggs. So that's how it's disproved
The radar during war could spot planes before they appired and the heart transplant
