Questions

FDA - Food and Drug Administration publishes the food code, a model that assists food control jurisdictions at all levels of government by providing them with a scientifically sound technical and legal basis for regulating the retail and food service segment of the industry which includes restaurents, grocerry stores, ...

NO.It is Transmission Controll Block

The network layer concerns with the packets. It brings the packets from the source to the destination.

We know that, preceeded means to come before. 

Hence, the given sentence, preceded in death means that person had died before this person.

For example :: Rahul preceeded Ravi in death, means Rahul died before Ravi.

Open market operations (OMO) refer to the buying and selling of government securities in the open market in order to expand or contract the amount of money in the banking system.