Because eukaryotes have a nucleus and that is where they hold DNA in a prokaryote they do nit havw a nucleus and can not hold DNA the same way eukaryotes do
        
             
        
        
        
Answer:
Explanation:
While every case is unique, the most common causes of train accidents include: Negligence. Human error. Reckless pedestrians and drivers.
...
Negligence. ...
Human Error. ...
Reckless Pedestrians & Drivers. ...
Mechanical Failure. ...
Speedy Trains. ...
Defective Tracks. ...
Derailments. ...
Unprotected railroad crossings.
 
        
             
        
        
        
Answer:
A. To oversee the operation of executive departments
Explanation:
The executive departments consist of several organizations  which were created to execute the government programs that are proposed by the legislative branch.
Currently, United States have 15 Executive departments. It is impossible for president to personally lead each department alone. This was the reason for the cabinet members. 
The president personally select each cabinet members based on a specific skill sets or other criteria's so they can run each departments on the president's behalf.
 
        
             
        
        
        
It kept people moving, enabling them to share their personal belief systems.
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Have A Good Day!!!
        
             
        
        
        
Answer:
"In international environmental agreements, the idea that scientific uncertainty should not be used as an excuse for inaction is known as:" <u>The precautionary approach.</u>
Explanation:
The precautionary approach is ability to asserts that the burden of proof for potentially harmful actions by industry or government rests on the assurance of safety. And that, when there are threats of serious damages, scientific uncertainty must be resolved in favor of prevention.