Final answer:
It is unsafe to eat leftovers that have been at room temperature for more than two hours; food must be refrigerated within that time to avoid foodborne illnesses. Melons must be washed before cutting to prevent bacterial transfer from rind to flesh. Foodborne diseases can lead to severe health conditions.
Step-by-step explanation:
When it comes to storing leftovers, it is not safe to eat food that has been left at room temperature for more than two hours, even if it is heated up well afterwards. Bacteria can multiply to dangerous levels at room temperature, and some of these can produce toxins that are not destroyed by reheating. Therefore, to avoid the risk of foodborne illnesses, leftovers should be refrigerated within two hours of cooking.
For the question about washing fruits, the answer is False. It is important to wash a melon before cutting it. The knife can transfer bacteria from the rind to the flesh of the fruit. Washing the rind reduces the risk of contamination and foodborne diseases.
Lastly, foodborne diseases can indeed cause a variety of symptoms and medical conditions, including forms that are very severe and potentially life-threatening. Good kitchen hygiene and proper food handling practices are essential to prevent these diseases.