The nervous sysyem because i looked it up on the internet. search gal stones effect which body system then but a dash .You will find that it says nervous system.
I believe it goes in the following order top down
1 5 3 4 2.
The answer is B
Explanation: RNA is single stranded and contain uracil
The immune system. It produces antibodies which fight the bacteria or virus that caused the infection
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