<span> Prokaryotes are a single celled organism that </span>doesn't have a nucleus<span> or membrane bound organelles.</span>
When forces on an object are balanced, the motion of the object does not change, however, this does not meet there in no motion, just no change in motion.
Since Mary has a Type A blood, she is either AA or AO while John is either BB or BO. Since both John's parents are Type AB, he can only have the either A or B as an allele and not O so he is BB. Since John can only give the B allele, all of his children must have the B allele in their blood types. So the adopted one is the child with type A blood.
In Haiti, UN workers accidentally introduced cholera.
The UN did not dispose of human waste correctly. This caused cholera to spread to local people.
The situation in Haiti could be improved by screening UN workers for illness, increasing water sanitation, and providing adequate sewage treatment.