The necessary actions are 
<span>- Inform the patient about her rights
</span><span>- Obtain consent from the patient
</span>
To be ethical, we should fully give informations to the perinatal patient about research without concealing anything. Including the potential side effects of the research and the payment/benefit that they patients would get if they agree to be a part of it
        
             
        
        
        
Answer:
Because they don't have fertilizer.
Explanation:
Well, if this was a long time ago, then farmers did not have fertilizer. So, there are bacteria on the roots of plants that convert nitrogen into a usable form. It's very important for growing, and when farmers harvest the crop, not much of the nitrogen is returned to the land, so it is not as fertile. Fertilizer is largely consisted of nitrogen, so that is why farmers use fertilizers today. But "a long time ago," farmers did not have fertilizer.
 
        
             
        
        
        
Weather conditions such as wind, the path of the flow
        
             
        
        
        
A karyotype is a picture in which the chromosomes of a cell
have been stained so that the banding patterns of the chromosomes appear. This
way it is possible to view abnormalities in the chromosomes. Disorders such as aneuploidy can be diagnosed by karyotype.
It can also help identify local abnormalities on chromosomes such as abnormalities
in chromosome length,  and location of the
centromere.