Comment by KevinChen6

Fruit (ripe fruit) tastes delicious because it needs to be eaten by animals, and then the seeds can walk around with the animal's feces, which helps plants reproduce, which can also be explained by Darwin's theory of evolution. With such a sour taste as lemon, no animal will like to eat it, which is likely to lead to the extinction of this plant. Therefore, the evolution of nature is unlikely to have such a thing as lemons.