Absolutely, black mold is harmful, throw it away.
for the most they can be but it all depends on the animal but most of the time rotten or moldy food is not good for animals
yes I believe it is harmful
Rotten potatoes
There is no mistaking a potato that is actually rotten. They will smell of ammonia and will be soft and watery.
Over a period of time an unshelled boiled egg will shrink due to dehydration. If left out in room temperature it will also dehydrate and become spoiled and blackin in color and grow mold and also produce a bad rotten oder.
Either the egg wasn't boiled long enough, or the egg is rotten. Or the egg is too fresh.
By using verbal irony, Anne is sarcastically suggesting that the combination of eating rotten potatoes with something else would be seen as delicious. By contrasting the unpleasant idea of eating rotten potatoes with the positive connotation of being delicious, Anne creates a humorous or satirical effect.
Those potatoes are old and rotten
unboiled eggs float, but the boiled ones sink.
Powder from rotten lemon could be poisonous. It may contain bacteria and other toxins which might be harmful to the body.
Barley, wheat and potatoes, plus some apples.
Yes. You should never eat anything that does not smell or taste nice.