Improper handling and storage of cereal grains and oilseeds result in the production of toxins known as aflatoxins which are not generally destroyed by normal cooking process. Aflatoxins are produced by

1. The question describes aflatoxins as toxins resulting from improper handling and storage of cereal grains and oilseeds, which are resistant to normal cooking processes. 2. Aflatoxins are a type of mycotoxin, which are toxic secondary metabolites produced by certain fungi. 3. Specifically, aflatoxins are primarily produced by species of moulds (a type of fungi) belonging to the genus *Aspergillus*, particularly *Aspergillus flavus* and *Aspergillus parasiticus*. 4. These moulds thrive in warm and humid conditions and can contaminate crops in the field, during harvest, or during storage. 5. Bacteria, protozoa, and viruses are different types of microorganisms and are not responsible for the production of aflatoxins. 6. Therefore, aflatoxins are produced by moulds.