Final answer:
Two specific examples of harmful fungi are Aspergillus and Claviceps purpurea. Aspergillus produces aflatoxins, while Claviceps purpurea causes ergot disease in cereal crops.
Step-by-step explanation:
Two specific examples of harmful fungi are Aspergillus and Claviceps purpurea. Aspergillus produces toxic and carcinogenic compounds called aflatoxins, which can contaminate nuts and grains, leading to massive recalls and food shortages. Claviceps purpurea causes ergot, a fungal disease of cereal crops that reduces yield and produces alkaloid toxins with harmful effects on humans and animals.