Zhao Lei and the students under the lecture were also stunned again, and they suddenly looked at Yang Haoxuan, who was still standing in front of the blackboard with a calm face.

"First of all, the reason why organisms mutate is actually caused by the natural environment of the world, the physical state of the world, changes in the world, genetics, lesions, chromosomal abnormalities, and other unexpected circumstances when the organism receives the egg!"

These can be roughly summarized into three categories: one is physical factors, such as human X-rays, lasers, etc., the other is chemical factors, which refers to substances that can interact with DNA molecules to change the properties of DNA molecules, such as nitrous acid, base analogues, etc., and the third is biological factors, including viruses and some bacteria. ”

"Variation can also be said to be a change in the gene structure caused by the addition, deletion or change of base pairs in the DNA molecule in an organism, which is called gene mutation or variation. ”

"Secondly, a gene mutation is a change in a gene at a certain locus on a chromosome. Genetic mutations make a gene its allele and often cause certain changes in the appearance of phenotypes. ”

"Some of these variations are only caused by the influence of environmental factors, and do not cause changes in the genetic material in the organism, so they cannot be inherited, and belong to non-hereditary variations.

"Some variations are caused by changes in the genetic material within the germ cells, so they can be passed on to offspring, which is a heritable variation. ”

"There are even three sources of heritable variation: genetic mutations, genetic recombination, and chromosomal variations. Therefore, there is no evolution without variation, which is the undoubted consensus of all evolutionists from ancient times to the present. ”

"Genetic mutations are of great significance in biological evolution. It is the fundamental source of biological variation and provides the initial raw materials for biological evolution. ”

Zhao ...... Teacher, I've finished talking about the most basic things of these biological mutation conjecture theories, you should be able to understand these, right?"

Zhao Lei looked at the sworn Yang Haoxuan in shock, and said secretly in his heart: "Could it be that biological mutation is produced in this way, but the field it involves and knowledge can be called a mutation discipline! No wonder, no wonder it will confuse human biological variation for hundreds of years!"

In fact, Zhao Lei didn't fully understand what Yang Haoxuan said, he could only understand about five percent! Of course, this is not because Zhao Lei is stupid, but because of this mutation conjecture, DNA, genetic mutations, and so on are the top problems in this world, so it is normal for Zhao Lei not to understand!

"Look, what's the tone of this? There are students talking to the teacher like this, and besides, how do I know that what you say is right!"

"Teacher Zhao, it doesn't really matter whether what I said just now is right or not! The important thing is that I believe that you already have your own correct answer in your heart!" Yang Haoxuan said with a smile.

"Good!"

At this moment, the class burst into thunderous applause. I don't know why they suddenly want to applaud, maybe it's because Yang Haoxuan said it so well, maybe it's because of those top problems, or maybe it's because they also look down on Zhao Lei as a teacher!

The corners of Zhao Lei's mouth suddenly trembled violently, he only felt that his cheeks were hot, and his heart was extremely humiliated.

"Yang Haoxuan, you can do it, you are amazing today!"

At this moment, Zhao Lei's face was almost lost, and he was no longer embarrassed to stay here.

"You wait, don't think you're going to have a world problem, you can do something, you see how the vice principal came back and expelled you!"

"Students, let's study on your own!"

After Zhao Lei cheekily explained these things, he didn't stop and ran out directly, and the whole class was shocked.

Yang Haoxuan watched Zhao Lei leave, and shook his head helplessly!

At this moment, Bai Luoling suddenly walked towards Yang Haoxuan's back and patted Yang Haoxuan's shoulder casually!

"You..."

Yang Haoxuan directly interrupted her words, and said lightly to the person without looking back: "If you come to ask about the mutant conjecture, I just want to say fuck off!"

"Heh, isn't it just a world problem? Besides, am I so boring?" Bai Luoling stood beside him, and the corners of his lips curled slightly and suddenly evoked an intoxicating smile: "Actually, I'm here to verify another thing. ”

"Oh, no! What are you going to prove!"

"Why, I'm curious, why have you suddenly become so good these days? From acupuncture, mathematics, English to biology, I found that you are completely proficient in all aspects!"

"This girl, has she been watching me?"

Yang Haoxuan still looks calm and comfortable on the surface, but in his heart he has already turned up turbulent waves.

"Don't say that you are a genius, what are you reviewing, those things are completely absent in our current textbooks, if you knew it before, then why did you pretend that you couldn't before, are you hiding something!"

Bai Luoling's pupils shrank, pressing Yang Haoxuan step by step!

Yang Haoxuan was in a trance, it has been 90,000 years, this Bai Luoling is the first time to discover his eccentric person, of course, this is not all Bai Luoling's vigilance, but the changes that have occurred before and after Yang Haoxuan are too great.

"Do you ....... want to know these secrets like that?"

"Of course. Bai Luoling stopped in place, his sharp gaze wandering over him.

"Do you have some unseemly identity! Are you a mercenary, a special forces, a policeman?"

Yang Haoxuan smiled playfully, looked at Bai Luoling contemptuously, and said, "If you are my girlfriend, then I will tell you all about me, how about come!"

"Sample, you want to inquire about me like this, how can you do it without paying some price?"