Chapter 1111

Xu anqing listened more carefully.

After another walk, he arrived at Professor Xie Gaoyi and asked softly, "what do you need to do to discover new species?"

It's obviously not the first time that Xie Gaoyi has met such a student, but he is willing to explain it to him. Looking at the students around him, they are all listening, simply raising their voice and laughing: "it's not easy to find new species. As you all know, the 18th and 19th centuries were the century of naturalists and the golden age. There were too many new species discovered《 The origin of species was also written at that time. At that time, there were even uninhabited islands. As long as you go up, you can do a good job in naming them for several years. "

At this point, Xie Gaoyi himself was at ease for a few seconds, and then continued: "not now. Now, like the Badaling forest area where we are now, it's like being shaved by a comb. I don't know how many times. It's not impossible for new species to appear. The probability is very low. "

Xie Gaoyi didn't dare to say anything. Badaling forest area is indeed the main education area of Botany departments of several universities in Beijing. There are countless experts and professors passing by and investigating, but what about that? In history, stories of new species found in the school teaching area have been heard all the time, and some universities even have this situation two or three times. The complexity of plants determines their characteristics.

Compared with Xie Gaoyi, who majored in plant science and grew up listening to the stories of natural history, the students felt less empathy. They just surrounded Xie Gaoyi quietly, waiting for him to talk about the meat part.

Xie Gaoyi once again immersed for a while, and then said: "if students are interested in plant taxonomy, study the classification of plants, discover new plant species, and understand the knowledge of new plant species, it is called plant taxonomy. If students have to stop there, the first thing to do is to observe plants, analyze plants, and, it's better to find the direction of a taxon. Do you know what a natural group is? "

The students shake their heads one after another. Some people recite the genera and species of Jiemen family, but they don't find out the concept of group.

Xie Gaoyi said with a smile: "a group is a taxon. When we talk about natural groups, we can see which group a species belongs to, that is, whether it has the same evolutionary origin as the species of the same group."

The students nodded their heads.

Xie Gaoyi came to class today, so he said, "let me give you an example. Pteridophyte is a group, they have the same commonness, for example, sporophyte, sporophyll, mature sporangium group, and transient gametophyte. If we determine these, we can basically determine whether a new plant is in the Pteridophyte group or in the non Pteridophyte group. But it's not easy to do that. "

Xie Gaoyi took a deep breath and said, "I have done research for more than 20 years. Now I dare to say that there are only a few familiar taxa. Let's put it this way. If you start to know several species every day from today, and in a few years, you will be familiar with one or two taxa, and then do field investigation according to different taxa, you will have a definite aim. "

Xu Anqing and his classmates all nodded slightly.

"It's a tough process." Xie Gaoyi sighed and said: "today, standing here, I have to pour some cold water on the students. Now, after identification, 99% of the species found by you are... Oh, so this is what is written in the book."

The students couldn't help laughing.

Xie Gaoyi also laughed and said: "you can still laugh now. When you encounter this kind of thing, you can't laugh. If you think about it, if you find a new species and you are sure you have never seen it, you have to make a good record and search. You have to borrow the specimens from our school to compare the plants of the same or adjacent groups. Finally, you find that it's all in vain. Are you angry? Are you upset? "

The students simulated Xie Gaoyi's route in their hearts, and they all felt sad.

Xu anqing was more careful. He trembled two times and said, "in this way, you have to remember the shape of the plants?"

"Yes. Why, it's hard? " lower

Xu anqing nodded obediently and said, "I don't think it's easy to remember."

"It's never harder to learn than English." Xie Gaoyi laughed twice and said, "now the technology is better. Let's say that the identification of which group is this kind of thing. We used to do taxonomy, but we had to do too much work. Now, we have to thank our classmate Yang Ruiyang."

The whole class was stunned for two seconds, suddenly looking back at Yang Rui.

Although Yang Rui didn't know why, he stood still with a smile and kept smiling.

Xu anqing can't laugh any more. Can God tell me what happened?

Xie Gaoyi didn't let everyone wait too long. He quickly solved the mystery and said, "we can identify the species by PCR method invented by Yang Rui. In short, we are not going to test whether the species are homologous? If we measure the DNA of species, we can know how to measure it. We can ask Yang Rui for advice after class. It should be said that this is the direction and trend of our biology in the future. Accurate quantification depends on Yang Rui's pioneering invention in this field, which is very meaningful. "Xie Gaoyi will Yang ruiba very high, listen to the students a Leng a Leng.

In the school, Yang Rui's news and news have never been interrupted. We all know that Yang Rui is very powerful. However, Professor Xie's evaluation is still amazing.

Today's students are familiar with all kinds of politicized tests. It's shocking to hear Professor Xie say that the trend of biology depends on Yang Rui's pioneering invention.

This is mainly because Xie Gaoyi is not a biology teacher, and Yang Rui is not a biology teacher. For various reasons, Yang Rui will not be promoted too high. Xie Gaoyi doesn't care. In fact, he has lowered some of his evaluation. In other words, he hasn't realized the greater value of PCR. Otherwise, the Nobel prize level technology will only get a pioneering evaluation.

Yang Rui is also not ashamed to accept Xie Gaoyi's evaluation, PCR worthy of this evaluation. As far as personal contribution to the world is concerned, making the first version of PCR ahead of time will speed up modern science.

In three or five years, there may not be much difference between these two items. In ten years' time, the patients who can get better treatment will not be able to be described by tens of thousands. Millions are modest words.

Yang Rui's high spirited and smiling face was red, but his body was cold, as if the military coat had not played any role.

Xu anqing thought of his father.

He was thinking that even his father would not get a better evaluation from a population like Professor Xie.

In comparison, Xu anqing felt more powerless and dispirited.

"The main forest is ahead." Professor Xie led the team to move on. The road was a little bit slippery and rugged, which made people have to stop thinking.

Professor Xie did not lead the team to the main forest area. Although it is the teaching forest area where the capital is located, the forest area is a forest area after all, and there are always countless dangers. If you are a plant major student who has conducted field investigation for many times, or a researcher in an institute who has done plant research for many years, you may lead the team to go deeper. For biology students who have conducted field investigation for the first time or perhaps the only time, there is no need to go deeper into the dense forest.

It's very difficult to walk around the forest.

The dirt roads in the forest area are crisscross, and it seems even more discontinuous in the distance. They are either destroyed by creeping weeds or covered by white snow. The uneven road is more exhausting, and even the students who often do physical work are panting.

The inevitable uphill and downhill is even more dangerous. Even if there is no moss, the stones in the forest area are extremely slippery by dew and thin snow. In some sections, students fall one by one. The latter looks at the front clumsily, but when it's their turn, they lie down clumsily.

When Professor Xie talked about the names of plants, the students could only look up and have a look. None of them took notes. Just taking notes and putting them down could make people tired.

Yang Rui also began to feel that his physical strength was overdrawn. He just felt that his bag was getting heavier and heavier. However, his spirit was very good, because he began to slowly match his road with the map in his mind.

"Professor Xie, let's go south. There's less snow in the south. " At the fork in the road, Yang Rui began to give advice.

Professor Xie didn't have any opinions, so he adjusted the direction according to Yang Rui's opinions.

After a walk, Yang Rui said again, "Professor Xie, let's climb the hill over there? Warm up. "

"You lead the way." Professor Xie doesn't know what Yang Rui means, but he wants to give face.

After so many times, Xu anqing felt uncomfortable.

"After being praised twice, I pretend to be a wolf with a big tail." Classmate Zuo Liyan, pondering Xu Anqing's mood, made an evaluation.

There are all kinds of relationships among college students. Zuo Liyan lives in Xu Anqing's upper bunk and always likes to run with him, which also forms a wonderful dog leg symbiotic relationship.

After two years of getting along, Xu Anqing is just like the Empress Dowager can't do without little plum, can't do without Zuo Liyan.

Zuo Liyan's words are just in Xu Anqing's mind. He laughs twice, takes a breath of the cold air in the forest area, laughs, and says: "let his tribe be able to discover a new species."

"He found a new species. Seeing him like that, I'll be angry. I can't listen to the teacher's command Zuo Liyan himself has a lot of dissatisfaction.

"If he loves to direct, let him direct. Maybe they're looking forward to putting a big satellite, and finding a new species in the North @ jingbadaling that no one has ever seen. " Xu anqing said and laughed.Zuo Liyan is also laughing and coughing.

Two people around a classmate heard, although not with echo, but also feel a little funny.

It's true that there are green and white woods on the left and right. It's exhausting to turn over a hill.

At the end of the team began to laugh, but before the team is walking more and more slowly, in front of Professor Xie's voice: "Yang Rui, don't go far."

"I think this plant is a little strange. I'll take a specimen, Professor Xie. Can you help me to have a look?" Yang Rui's voice came from the open forest, which aroused the curiosity of the students.

……