1. 1 100 million years ago, mosquitoes and flies may have appeared on the earth. Of course I will die. My life span is short. The life span of mosquitoes is generally 1~2 weeks, while that of flies is generally about one month. If the temperature is right, it can last for about two months. People who think that flies and mosquitoes will not die may be because all flies and mosquitoes look roughly the same, and no one will deliberately distinguish whether the mosquito bitten this time is the mosquito bitten last time.

Because people living in cities are seldom bitten by insects, mosquitoes have become one of the most annoying animals in summer. Because mosquitoes have no effect on us, but they will still suck our blood. The most important thing is that the bag produced after blood sucking is itchy, so although mosquitoes are small, they have indelible memories in people's hearts.

Although in our opinion, mosquitoes and flies have no influence on us, it is only relative to people in the city. In fact, in rural areas, mosquitoes and flies play a great role. Some flies will also undertake the work of spreading pollen, and in the survival law of nature, many small animals in the wild will be digested by flies when they rot on the ground after death, so flies are usually annoying, but they are not essential in the whole environment.

The existence of every animal has its significance, and many creatures in nature are constantly evolving, but the significance of these special little creatures is mostly to maintain the balance of the whole ecosystem. Let's imagine how many animal and plant carcasses would be difficult to deal with if there were no small bacteria that decompose organisms in the world. It is with these creatures invisible to the naked eye that the whole ecosystem can be balanced. Even if we think about them, they are useless, but they are actually indispensable.