Various lab tests and procedures would be used to determine the presence of toxins in food. The specifics would depend on what toxin you would expect to find.
In foods grown organically, there are no poisons.
Food & Drug Admistration
No. They are called POISONS and do not select animals to kill. They kill ALL.
by killing shark food with toxins
Biomagnification
if the ink contains poisons in it's main composition, such as lead and other poisons, but most poisons in ink have to be consumed in large quantities to be of any effect
They process their food in complex traditional ways to ensure that they do not ingest poisons.
Yes, any body tissue can hold residual amounts of medications, drugs, poisons, toxins.
One of them is food poisoning, and shigella poisoning
I am pretty sure it isn't
Biomagnification
One of them is food poisoning, and shigella poisoning