Chapter 49

However, the girl seemed a little shy and shy, and did not respond to Kun. Professor Li explained: "she explained to me before. In fact, there is no fixed discrimination method. Even for the same kind of bird, each bird may be different, and it should be judged according to the surrounding situation at that time. If there are more than one bird calling, they need to be compared with each other for reference. At the end of the day, it's about judging emotions through sound. But I tried many times according to her, but I couldn't hear anything. I think her hearing is better, and it has something to do with more details and wider frequency range... "

After chatting about this topic for a while, "little apple" seemed to be less afraid of strangers and took part in their discussion.

Li Yang said that his daughter's hearing is better than ordinary people and can hear more details, so it is difficult for him to learn. But this problem does not exist for Xiang Kun. He is sure that his hearing must be much better than this girl.

After communicating with the girl directly for a while, he also grasped some of the tricks of distinguishing bird songs. Moreover, according to the comparison of various bird calls he had heard in the mountains during this period, he determined that the girl's words were useful.

However, if you want to master it and be able to apply it in practice, you have to have more practical exploration and training.

After chatting, Xiang Kun learned that Li Yang, an associate professor, was actually from the College of life sciences. His main research field was "the relationship between complex microbial communities with important functions in natural and artificial environments". From the perspective of improving cultivation methods and mastering metabolic characteristics, he tried to cultivate and isolate unculturable microorganisms with important functions and application value Group.

Although Xiang Kun had a lot of books on biology, medicine, cells and genes a while ago, when Li Yang really talked about his major, he was still a bit confused and could only consult as a student.

Xiang Kun has been hoping to consult professionals on his own situation. Professor Li Yang's professional fields and knowledge reserves should be regarded as "professionals".

Of course, he will not directly tell Li Yang about his own situation, but slowly guide the topic to the direction of mutation and gene mutation.

“…… Professor Li, do you think it is possible for birds to change their size to three, four, or even five or six times their original size for some reason

"Do you mean the individual or the whole group?"

"Individuals, like an owl Or vultures or something

"It's almost impossible. You have to know that if you are three or four times bigger, you may have to increase your weight by more than ten times, and your bones and muscles can't bear it." Li Yang shook his head: "even if it appears, that kind of individual will not survive. Unless its entire body structure and tissue strength are remodeled, the mutations that occur in individuals will not be so orderly and stable. "

“…… Professor Li, do you think it's possible for a person to mutate for some reason, such as the digestive system, and then the way of energy intake changes, as well as other organs and tissues of the whole person, so that the body function can be improved... "

"You don't mean to say that after mutation, there are powers?" Li Yang couldn't help laughing and said, "we often use a sentence to describe the characteristics of gene mutation: generally, the random frequency is low, the harm is more than the profit is not directional."

Li Yang continued: "that is to say, gene mutations are common in the biological world. It is possible to occur at any time and any part of the individual development of organisms. It is random, and the mutation frequency is very low. Moreover, the variation is generally harmful to the individual, and the beneficial is very few. As for non orientation, it means that more than one allele can be produced

“…… However, any complex and systematic change of the human body may bring about a complicated and stable consequence. The usual external manifestation is illness, or deformity. Brother Xiang, you are a programmer. Do you think that if a large program with sophisticated and complex design, such as the operating system, has a bug, is the bug good or bad? "

Xiang Kun thought about it and said, "for programmers or administrators, bugs are bad and need to be fixed. But sometimes, bug may also bring benefits to users... "

Li Yang nodded: "you see, this is the case. In most cases, it is bad. Occasionally, in some special cases, a few will bring benefits, but there is a risk of overall collapse. The same is true of mutation. If it is only a small variation, it may have little impact on the whole human body, or it may bring certain benefits and convenience. For example, lactose tolerance mutation, so that adults can also secrete lactose decomposing enzyme, can better enjoy dairy products. However, if the mutation has a great impact, the benefits are not worth mentioning compared with the disadvantages. There may even be domino effect, causing the whole human system to collapse or even die

“…… In the future, there may be artificial genetic modification and the birth of super humans, but now It is basically impossible to have superheroes in movies and comics by accidental variation. "

In fact, Li Yang had read a lot of biology and gene related books before Xiang Kun. Just because of what happened to him and the giant owl, he couldn't believe the textbook completely.

"Professor Li, do you think it is possible? In fact, there are a whole set of mature mutation mechanisms in nature, but they have been hidden Hidden in the body of some human beings or other creatures, it will not be excited until certain conditions are met? "Li Yang shook his head: "you are already similar to the category of mysticism. Literary works, novels and movies can be set up directly, and the logic is OK. But science is about evidence. Without evidence, we can't infer from nothing. "

Xiang Kun asked again, "what does Professor Li think of vampires?"

"If you ask me about rabies or porphyria, I can talk about it. After all, there are cases, pathological studies and various documents. But vampires and zombies, in essence, are like superheroes. They exist in literary works, legends and myths. There is no real evidence to prove that they have appeared in reality. So we can only talk from the perspective of literature and art, not from the perspective of Science Well, I like vampires at night and four hundred years of surprise Li Yang said with a smile.

Xiang Kun wanted to go back and grab Li Yang's collar in the back seat and say to him in a loud voice: Laozi is a vampire, Laozi is ready-made evidence!

But just to think about it, he would not disclose his secret to the first time he met.

In fact, they had already arrived at the foot of the mountain. However, Li Sheng saw that the three of them had a heated discussion, mainly Xiang Kun and Li Yang. So they simply took Xiangkun to the station in the city. Anyway, they would go back to the city. Along the way, you can continue to chat.

After arriving at the station, Xiang Kun, Li Yang, Li Sheng and Xiao apple left each other wechat messages, and then got off to say goodbye.

Looking at Xiang Kun walking into the ticket hall, Li Yang in the car shook his head and sighed: "I didn't expect that Xiang brother, who is 30 years old, is still so obsessed with superheroes. By the way, little apple, what's the word you said before? What two? "

"Secondary two." Little apple said and shook his head: "Uncle Xiang, this is not called secondary two. He seems to want to hear from his father the theory that can help him explain those superheroes and vampires."

"How can it be..." Li Yang said with a smile.

"Brother Xiang's feet are dirty," Li Sheng, who was driving, said suddenly After a pause, he added, "it's very dirty."

"Well?" Li Yang is puzzled and frowns. Because of the speculation on the road, Li Sheng gives Xiang Kun the pair of slippers that he wears. Li Sheng says this, not because he dislikes Xiang Kun's dirty feet, but to express other meanings.

Li yanglue thought for a moment, then understood: "you mean, to brother barefoot walk a long distance?"

Li Sheng nodded: "the thick layer of hard mud wrapped on his feet must not have come out on the winding mountain road. He must have walked a long way in the mountains. And when he washed his feet, I saw that there were no wounds on his feet. This shows that he is very skillful and knows how to avoid obstacles that can hurt his feet. I suspect he went into the mountain barefoot on purpose, without shoes at all

"Deliberately not wearing shoes? Why is that? " Li Yang asked.

"Maybe he's a ascetic monk. Tut Tut, if he wears a monk's robe, I'll think he's a monk with real kung fu." Li Sheng said, laughing himself.

Li Yang shook his head: "people are not programmers, what monk don't say nonsense, he himself said, bald is because of hair loss..."

At this time, the small apple on his side suddenly opened his mouth: "there is no smell on my uncle."

This made both of them stand still for ten minutes, sweating profusely.

But in retrospect, Xiang Kun seemed to be very dry, and he didn't see how to sweat at all. Even if the sweat dries up later, the sweat before it must have a residual sour smell. Both of them knew very well that the little apple not only had more sensitive ears than others, but also had the same sense of smell. Even she said that it had no taste, so it was definitely not sweating.

Li Sheng smiles and shakes his head: "this to brother, a bit interesting."

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