The energy needed by a system to initiate a process is called as the activation energy. It describes the minimum energy which must be available to a chemical system with potential reactants to result in a chemical reaction. Hope this answers the question.
        
             
        
        
        
Answer:
La razón por la que a partir de los núcleos de las células del intestino de un renacuajo albino, se obtuvieron ranas albinas en lugar de células intenstinales, es que fué un experimento de clonación.
Explanation:
Este experimento realizado por John Gurdon  en 1960, se conoce también como transferencia nuclear, y demostró que la información hereditaria guardada en el núcleo celular, es suficiente para generar un nuevo organismo y permanece integra durante el desarrollo de células diferenciadas debido a sus señales citoplásmicas.
 
        
             
        
        
        
Answer:
physical change alert the form of appearance of the matter but does not turn any substance in the matter into a different substance. 
 
        
             
        
        
        
Hey there!
The answer is 
Newtons first law of inertia. "An object with no net forces acting on it which is initially at rest will remain at rest. If it is moving, it will continue to move in a straight line with constant velocity"
Hope i helped! 
Please mark me brainliest!!!!!
        
             
        
        
        
Answer: possibly A
Explanation: B an C are not it because they are more like mutations. D humans don’t always become immune.