The scenery of New Blos is becoming more and more open, the density of large trees is decreasing, there are more and more low flowers and plants, and people's feelings are also from depression to openness.

Suddenly, Rita Yama shouted, "Teacher, come and see, hurry!"

Totekchaski walked briskly, and Rita Rima rarely made such a fuss unless there was some major discovery.

"Teacher, look," Rita Rima said, pointing to a cluster of bright flowers, "this trumpet flower has bloomed on the crape myrtle tree. ”

"Are you sure it's on crape myrtle trees?" Totekchaski dropped his jaw, for trumpets generally climb on other trees at most, and cannot bloom on other trees.

"Yes, it was the crape myrtle tree that produced trumpet flowers. Oda Rima pointed to the root of the trumpet flower and instructed Totekchaski to look at it, because the old man's eyesight was not good, and he might not be able to see clearly.

Totekchaski finally saw clearly that it was indeed the trumpet flower that bloomed on the crape myrtle tree. "What's so unusual about crape myrtle trees blooming trumpet flowers?" Pang Xiaonan leaned over, thinking to himself, you city people, haven't you seen the diversity of species in the countryside?

Totekchaski turned to Pang Xiaonan and said, "Have you ever seen a crape myrtle tree bloom with trumpet flowers?"

Pang Xiaonan shook his head and said, "No." ”

"It's not unusual to say nothing!" Rita Rima glared at Pang Xiaonan viciously.

"Although I haven't seen a crape myrtle tree bloom trumpet flowers, aren't all plants graftable?" Pang Xiaonan said disapprerovingly, "Maybe the seeds of the trumpet flower fell on the crape myrtle tree, and then bloomed on the crape myrtle tree." ”

Pang Xiaonan's imagination is very rich, but it sounds like there is a little truth to the Black Mamba Guards.

At this moment Bucton Lin came over, because he found that the team had stopped, and walked to the crape myrtle tree, and he asked, "What's the matter, why don't you go?"

Pang Xiaonan turned to Bucton Lin and said, "Captain, they are studying the trumpet flowers on the crape myrtle tree. ”

Bucton Lin looked curiously at the cluster of purple and red trumpet flowers, and asked, "It is indeed interesting for the crape myrtle tree to bloom trumpet flowers, but is there any explanation for this? I mean, is it strange? Or is it impossible at all?"

Bucton Lin raised his head and looked at Totekchaski, and then at Oda Rima, meaning that you stopped to study the crape myrtle tree, is there any major discovery here.

"Major Buctonlin," Totekchaski plucked a trumpet flower, "and you may not know that in real circumstances, it is impossible for a crape myrtle tree to produce a trumpet flower. ”

"Old man, is what you said true?" Pang Xiaonan felt that Totekchaski was making a little fuss, grafting was a very common technique, "Don't fool us, at least we have all eaten apples and pears, two different plant species, can't they be grafted together to produce new species?"

Totekchaski picked up the trumpet flower and sniffed it under his nose, and took a deep breath, the smell of the trumpet flower was fragrant, not like the light smell of ordinary trumpet flowers.

He looked at Pang Xiaonan and said, "Strictly speaking, the one you eat is called a pear apple, that's right, it is the product of the grafting of apples and pears, and there is a famous story in it." ”

Bucton Lin looked to the left and right, and then to his watch, and before the procession had been here, it had been an hour of walking, and everyone was a little tired, so he announced: "Let's take a break, and by the way, listen to the story of Professor Totekchaski." ”

So, the expedition team sat on the ground, and the Black Mamba escort gathered around them, and listened to the old story told by Totekchaski:

Mikhadov is an excellent elementary school drawing teacher who has taught drawing classes year after year in this small remote town. As always, he evaluates his students' drawing assignments according to his own standards and never makes any mistakes.

As usual, Mikhadov walked up to the podium with a somewhat playful mustache and taught the students to draw apples. He looked around the classroom, his mustache shaking happily, and he was satisfied. Suddenly, his eyes fell on the desk in the corner of the corner, where sat Eureka, who had just transferred to the class, his father was a ranger in the Great Forest, and it seemed that he was deliberately mischievous when he was transferred to work in a small town due to illness, and Eureka had a long, round apple, pointed pedicle, and painted pear-yellow. It can be said that he did not paint apples at all. "Are you drawing an apple?" the child replied, "It's an apple." "I look a little like a pear. "Yes, teacher, some apples that look like pears. Mikhadov told the boy that the apples were oblate and round, and that they should be light yellow with some bright red. His tone was very gentle, and he hoped to use the teacher's usual reasoning and probation methods to make Eureka give up this pear-like apple. But the boy did not pay any attention to the gentleness of the teacher, and he said that in the great forest, an apple tree and a pear tree were each cut in half by lightning, and the two trees were close together, and grew into a tree, and one side bore this pear-like apple. He had eaten this apple. He was the only person in the world who had ever eaten this apple, because the two trees only bore one apple, and later, both trees slowly rotted and died.

Mikhadov, who listened intently, felt the taste of mockery at the end of the story. He tore off the pear-like apple with a "snap", "Either take out the apple you are talking about, or draw my apple obediently." Otherwise, don't come to class again!" the class burst into laughter. The little boy from the dirt of the great forest cowered pitifully in the corner, but he still stubbornly insisted: "There is indeed this apple, I have eaten this apple." ”

The next day, the child obediently walked up to him with a workbook full of apples. To Mikhadov's surprise, the apples were better drawn than the other students' apples, except that each round and brightly colored apple was sprinkled with speckled tear stains

If Eureka had been a lying child, it would have been that way. But after Mihadov's covert visit, Eureka never lies. Mikhadov, as usual, attended his drawing lessons, but the two lovely mustaches seemed to have a cold, and no longer shook with joy: those tears were deeply imprinted on his heart. Every class was a torture - he didn't dare to look at Eureka in the corner, and he was even more afraid of the ridicule of his classmates, and those sharp laughter pierced his heart like an awl.

He knew he had to figure out if there was an apple like a pear. He went to the ranger's house to inquire, and he went to the post and telecommunications office to send letters, and he asked everywhere, but to no avail. Finally, one day, he jumped into a dilapidated car and rushed to the National Institute of Landscape Architecture a thousand kilometers away, where the horticulturist Michurin listened to his story, suddenly jumped up like crazy and took out vodka, toasting him again and again for his story, for the dust of a thousand kilometers on his body, and for his venerable pain. Michurin said excitedly: "Dear Mikhadov, I really don't know if there is such an apple in the world, but I must thank you. It will take at least three years to answer this question, and perhaps, in the autumn after three years, I will give you an apple like a pear. ”

Three years have passed. Suddenly, one day, the door of the classroom was slammed open, and a man covered in a thick layer of dust walked in. This is none other than the great Michurin, who holds two magical golden apples in his hands. Michurin stepped up to the podium and told the students about the inspiration he had learned from Mikhadov's story about how he used grafting to get pear apples: "This is a real revolution in the plant world, with grafting we have thousands of miraculous fruits that we have never seen or eaten. And the two people who started this great revolution were Mikhadov, a drawing teacher, and Eureka, a teenage student. ”

As three years ago, Mikhadov stood on the podium with a look of vigour, and his mustache shook happily again: "Students, let's draw apples again, and what I want to say is, please draw apples that are different from mine." Eureka-san, please draw another pear apple. ”

Once again, Eureka had drawn the apple covered with tears, but it was Mikhadov who accidentally got it.

As Totekchaski spoke, everyone listened in silence until he finished telling the story.

Finally, someone realized that the story was over, and took the lead in applauding, and Oda Rima secretly wiped the tears from the corners of her eyes, what a touching story.

Pang Xiaonan gave a thumbs up to Totekchaski and said, "Old man, you tell this story well, your class must be very interesting, no wonder you can bring out such an excellent student as Professor Rita Rima." ”

Pang Xiaonan made a pun, praising both Totekchaski's class level and Oda Lima's excellence, which made people listen very comfortably, but he immediately changed his words, "According to your story, since you can have pears and apples, why can't you have crape myrtle horns?"

Totekchaski put the trumpet flower under his nose again, took a deep breath, and said: "Plants and animals that are more closely related can be combined, but the offspring have little or no reproductive ability. For example, this is the case of mules, ligers, pears and apples, tigers and lions, apples and pears all share genes. In animals that are more distantly related, sperm and eggs cannot identify each other and cannot produce fertilized eggs. Even if the cells are forcibly fused, the genes of one species cannot be expressed properly in the cells of another species, so the embryo does not develop normally. ”

"That's reproductive isolation. Lima Oda added, "Broadly understood, reproductive isolation refers to the inability of genetic exchange between two species, which is also a sign of the emergence of different species. There are now 1.8 million known species on Earth, and scientists predict that there will be many more that are not currently discovered. If these species go back to the past, they all have a common ancestor, because they have taken different evolutionary paths, resulting in superdifferences getting bigger and bigger, and finally becoming different species. ”

After listening to Totekchaski's story, many people began to do their own things, such as someone wanting to go to convenience, someone wanting something to eat, someone wanting to drink some water, and everyone still lacked some interest in purely theoretical things, except for Pang Xiaonan, who listened to Oda Lima's explanation with relish.

"The biological classification of modern society: kingdom, phylum, class, order, family, genus, and species, is mainly distinguished according to the distance of kinship between various species, just like the concept of grandfather-son-grandson and so on. For example, the animal kingdom and the plant kingdom are far apart, and if it is specific to the different species under each genus, then it means that they are closely related. For example, tigers and lions are members of the same genus of cats, leopards, and it is under the genus leopards that they have taken different evolutionary paths. And the taxonomic boundaries, phyla, classes, orders, etc., are the same at the top. Reproductive isolation is easy to understand if it occurs between an animal and a plant, for example, how a tiger can have a genetic exchange with a tree. But when the relatives are closer, the two species can also mate with each other, and even more amazingly, they can give birth to offspring. The most typical are ligers or tigers born of lions and tigers, and mules born of horses and donkeys. Rima Oda observed the crape myrtle tree that bloomed with trumpet flowers, and casually came up with the basic theory of reproductive isolation.

"What you mean is that crape myrtle and trumpet flower belong to completely different species, and it is impossible to produce a combination. Pang Xiaonan understood the meaning of reproductive isolation, and then he understood why Rita Rima and Totekchaski made a fuss about the crape myrtle tree.

"That's the truth. Oda Rima looked up at the crape myrtle tree's own flowers, this tree has two kinds of flowers, it is really incredible, but it is very beautiful.

"Since there is reproductive isolation between different species, and lions and tigers, donkeys and horses all belong to different species, but they can mate and produce offspring, isn't this genetic exchange, and there is no reproductive isolation?"

"In fact, reproductive isolation has a more rigorous definition, it can be divided into a variety of situations, for different plants there is reproductive isolation at different flowering periods, for different animals, there may be different body types or reproductive habits that cannot mate, this is reproductive isolation, and for close relatives, they can mate but the offspring are not fertile, which is also a kind of reproductive isolation. In addition to research, Rita Rima is also a university professor, and these questions are not new to her, "That is to say, ligers, cetaceans or mules are all members of the same genus because they are closely related, and their reproductive habits are still matched, so they can mate and give birth to offspring." However, due to more essential reasons, such as chromosomal differences and genetic differences, the offspring born cannot form normal gametes, so the offspring are infertile. In this case, although the genes of the lion and the tiger are embodied in the next generation, the next generation will not continue to inherit downwards and will end directly, so it is not a genetic exchange. ”

"It's too complicated," Pang Xiaonan looked at Lewis, "I think it's easier for us to practice well, and leave these academic matters to the professors." ”

Lewis nodded and said, "There is a specialization in the art industry, and the professor does the professor's business, so we still do the manual work." ”

Oda Rima looked at Lewis and corrected: "I can't say that, I still want to learn kung fu from you, you also have to learn the necessary knowledge, practice not only requires physical strength, but also requires brains." ”

Pang Xiaonan glanced at Lewis, then raised his legs and walked to the side.

Lewis followed, and Pang Xiaonan said to him: "Don't discuss it with a professor-level woman, you can't talk about her, and you will be poisoned by her then." "Pang Xiaonan is very experienced, and Oda Lima has no professor style at all when he becomes a killer.

Lewis smiled, then frowned and said, "Eh, don't you think, the more we go inside, the less dangerous it seems to be, I think it's a little weird." ”

"Oh, you mean, we have to be in some danger, and that's just the way it makes sense. Pang Xiaonan leaned against a tree and looked at the quiet scenery, "Maybe we have passed the test of New Bloss, and now we have arrived at a paradise." ”

"Not necessarily, the trumpet flowers on the crape myrtle tree we saw just now don't seem to be dangerous, but does this phenomenon also mean that the environment here is a little weird. Lewis looked at the trees and flowers around him, looking for another plant that violated reproductive segregation.

"I'm very curious when you say that," Pang Xiaonan pointed to the woods in the distance, "If there is a creature from that forest that doesn't look like a tiger and a bear that doesn't look like a bear, then it really reflects the strangeness of this place." ”

"Yes, since plants can be hybridized so unscrupulously, then there is no need to talk about animals. Animals are more mobile and active than plants. Lewis also looked at the woods in the distance, full of anticipation.

"But let's not think so. Pang Xiaonan held a thick leaf vein in his mouth, and his hands shook at will.

"Why?" Lewis licked his dry lips and walked over from the stream, he hadn't taken a sip of water yet.

"You think, we have a hard time dealing with a single species, and if there are any more hybrid monsters, we will have a hard chance of winning. Pang Xiaonan gave vivid examples, "such as the speed of a leopard, the strength of a bear, and the ferocity of a tiger at the same time...... It's scary to think about. ”

"You've crossed too much, and you have so many abilities at the same time. Lewis also admired Pang Xiaonan's imagination, shook his head with a wry smile, and took the kettle from his waist.

"How is it impossible, you don't know that there are a lot of mixed races in our country, and there are a lot of bloods. Pang Xiaonan's analysis is correct, Huaguo is a country of immigrants, many people have grandparents of different bloodlines, mixed around, no one knows which bloodline they are, and various genes are mixed, which also causes Huaguo to have a rich and colorful race.

While the two were talking, an animal suddenly ran out of the woods.

"Look, is that a rabbit?" Pang Xiaonan asked Lewis, pointing to the animal.

Lewis looked up and saw that the bouncing animal did indeed look like a rabbit, but it was much larger than the average rabbit, the size of an adult earth dog.

"Such a big rabbit seems to be well nourished. "Lewis is no stranger to the size of the animals in New Bloss, all the animals here are larger than the others.

"Eh, how about we call that rabbit?" Pang Xiaonan glanced at Lewis, but he had already rushed out with all his strength.

I haven't seen a live animal for a long time, and today's meal hasn't landed yet, so Pang Xiaonan remembered the roast rabbit meat, such a big rabbit, how can I say that it can supply a few people's food.

"Look, Pang Xiaonan is chasing rabbits. Several people in the scientific expedition team had already reacted, and they were amazed by Pang Xiaonan's agile pace.

At the moment when Pang Xiaonan rushed out, Lewis also rushed out, he didn't show any performance in the Black Mamba Escort Team, thinking that being able to fight a rabbit could be regarded as a contribution to the scientific expedition team.

The hare was unusually flexible, rushing left and right on the grass, sometimes jumping, sometimes running, Pang Xiaonan had no way to take it for a while.

"Damn, this rabbit is going to be fine. Pang Xiaonan looked at the rabbit that teased him, suddenly stopped, crossed his waist and thought of countermeasures.

Lewis saw Pang Xiaonan stop, while the hare paced slowly on the grass, occasionally biting two bites of grass, as if deliberately mocking the two people chasing it.

"Pang Xiaonan, let's block it at the same time, you chase it in the back, I'll block it in the front!" Lewis shouted at Pang Xiaonan, who went hunting with his family when he was a child and knew how to hunt.

"Okay!" Pang Xiaonan saw that Lewis had joined the rabbit catching competition, and began to get excited, and the wind under his feet pounced on the rabbit again.

The hare reacted quickly, and as soon as he saw Pang Xiaonan start, he immediately ran towards the front.

Suddenly, Lewis appeared in front of the hare, and the hare did not panic, and with a single turn, he swept in the direction of Lewis.

"The human-rabbit war, it's the first time I've seen it. Nandegrad leaned against a tree and watched with interest as Pang Xiaonan and Lewis ran around the rabbit.

"Let's make a bet, I bet that Pang Xiaonan and they won't be able to chase the rabbit. Bridge-Morgan was in the mood to spice up the rabbit fight.

"Okay, what are you betting on?" Wu Zhen immediately became interested when he heard that there was a gambling game.

"Bet 1 million. Bridge-Morgan didn't blink an eye before throwing his chips.

"Boss, you're too arrogant, I can't afford to gamble. Wu Zhen was frightened off by Bridgemorgan's bet, he couldn't make so much money from his hard work, and he might even take his life.

BridgeMorgan frowned and said, "Then don't be angry, whoever loses will get under the other party's crotch." ”

Wu Zhen also frowned, this is a bet that damages the dignity of men.

"What, you don't dare to bet?" BridgeMorgan urged while wiping his gun when he saw that Wu Zhen didn't react.

"Bet on it, whoever is afraid of whom!" Wu Zhen was provoked and spat on the ground fiercely.

The corners of Bridgemorgan's mouth raised, as far as he knew, it was difficult for humans to catch up with rabbits, even wolves and leopards in the animal kingdom were rare to catch up with rabbits.

Pang Xiaonan and Lewis are still working together to encircle and suppress, but unfortunately, every time Pang Xiaonan wants to succeed, the rabbit seems to be smeared with oil, and it slips out of Pang Xiaonan's hand.

Lewis was running when he suddenly stopped and bent down to pick up something.

Then, Lewis restarted, and when he was about 10 meters or so close to the rabbit, he raised his hand, and with a snap, a hidden weapon shot out of his hand, hitting the rabbit's thigh.

The rabbit suddenly lost his sense of direction, staggered to the side, Pang Xiaonan took an arrow step, his eyes were fast, and he rushed to the front of the rabbit, stretched out his hand, and lifted the rabbit up.

"Haha, I'll let you run!" Pang Xiaonan lifted the rabbit's thigh and walked towards Lewis proudly.

"What kind of hidden weapon did you hit?" Pang Xiaonan originally wanted to take out the spirit stone flying knife from his waist and shoot, but he didn't expect Lewis to strike first.

"It's nothing, it's just a pebble picked up on the ground. Lewis smiled, clapped his palms, and looked at the dog-sized hare, only to find that the rabbit was grinning with its teeth, very fierce.

"This rabbit seems to be very fierce. Lewis pointed to the rabbit's teeth, "These teeth are too sharp, be careful, don't let it bite you." ”

"This guy fell into my hands, and he still wants to be arrogant," Pang Xiaonan poked the rabbit's head, "I'll eat you in a while!"

The rabbit reacted very violently, and desperately raised his head to bite Pang Xiaonan, but was thrown twice by Pang Xiaonan and couldn't move.

"Haha, Mr. Bridgemorgan, I won!" Uquake gloated as he turned to Bridgemorgan, "Come on, make good on your promise." ”

Wu Zhen spread his legs, clasped his hands in front of his chest, and looked at BridgeMorgan proudly.

"Well, I'll give you 1 million," Bridgemorgan obviously didn't expect to lose, but he was calm, "the money is a real thing in your bag." ”

Wu Zhen was stunned for a moment, and then said firmly: "Mr. Bridgemorgan, money is of course very important, but admit defeat in the bet, please fulfill your promise." ”

Although 1 million made Wu Zhen's heart move, as a tough man of steel, wealth cannot be lewd, he plans to humiliate the rich man in front of him once, let him know that money is not everything.

"You really don't want 1 million?" Bridget Morgange looked at Wu Zhen strangely, he didn't believe that there were guys in the world who were against money. Although the salary of the Black Mamba is not low, it is impossible to get to the point of improperly paying 1 million.

"I'd rather watch you get under my crotch than 1 million. Wu Zhen's expression became serious, and he decided to fight Bridgemorgan today.

"What are you doing?" Bucton Lin noticed something strange here, and walked over from the side, his eyes fixed on Wu Zhen.

"Captain, we just made a bet that Mr. BridgeMorgan lost and he was going to get under my crotch. Wu Zhen spread his legs a little more so that Bridget Morgan could drill them.

"Nonsense!" Buchton Lin shouted at Wu Zhen and turned to Bridgemorgan, "Mr. BridgeMorgan, I'm sorry I didn't discipline my men well, please forgive me. ”

"Captain!" Uzhen was a little annoyed when he found that Bucton Lin was helping BridgeMorgan, "This is a gamble between the two of us, please don't interfere, Mr. BridgeMorgan must fulfill his promise today." ”

"I order you, get over there now!" Bucton Lin held out a finger and pointed into the distance, "It's an order!"

"Yes, Captain!" Wu Zhen saw that Buktonlin was angry, immediately gathered his legs, respectfully saluted, and ran in the direction of Buktonlin's finger.

"I'm sorry, Mr. Bridgemorgan, but I can't discipline it, and it will never happen again. Bucton Lin apologized to BridgeMorgan.

"It's fine. Bridgemorgan turned his head away, secretly glad that Bucton Lynn had come in time.

Pang Xiaonan walked towards Bucton Lin with the rabbit and greeted him from afar: "Captain, our lunch has been settled." ”

Bucton Lin's eyes fell on the huge rabbit and exclaimed, "It's so strange that this new Bloss's rabbit is so big. ”

Several members of the Black Mamba Escort surrounded him, and Wu Yongqiang said, "You two are so skillful, I'm going to hit it with a sniper rifle." ”

Pang Xiaonan pointed at Lewis and said with a smile: "Thanks to Lewis's secret weapon, it's really a hundred shots." ”

"Eh, how are you going to eat this rabbit?" As soon as he said about eating, Dawo Khan Khan became interested, "Is it braised or steamed, or barbecued?"

Dawo Khan frowned, the rabbit was still alive, and he was already drooling.

"What you think is beautiful," Pang Xiaonan lifted the rabbit upwards, so that the rabbit's head leveled everyone's eyes, "We have no tools, no seasonings, we can only barbecue." ”

"How can you eat bunnies?" Rita Rima popped out of nowhere.

"You've eaten all the spiders, and you still mind eating bunnies?" Pang Xiaonan glanced at her, "Or don't you eat it, we'll eat ours?"

"You guys are so cruel that such a cute rabbit can eat it. Oda Rima said and went to touch the rabbit's head, but he didn't expect the rabbit to be fierce, and he opened his mouth to bite Oda Limma.

Pang Xiaonan withdrew the rabbit back in time to let the rabbit succeed, but it frightened Xiao Tian Lima's face.

"What a fierce rabbit!" Rita Rima was shocked, but made a shocking discovery, "This rabbit has a problem with its teeth!"

"What's the problem?" Pang Xiaonan curiously mentioned the rabbit and said to the rabbit, "Open your mouth and let me see." ”

The rabbit really opened its mouth, revealing sharp teeth and sharp teeth, and bit Pang Xiaonan indiscriminately, but unfortunately, its body was in Pang Xiaonan's hands, and it was controlled by Pang Xiaonan, and it couldn't bite Pang Xiaonan at all.

"It's not a rabbit's tooth!" Rita Rima came to a startling conclusion as she looked closely, "It looks like a canine tooth." ”

"Canine?" Pang Xiaonan turned his head curiously to look at Rita Lima, "You mean, this rabbit has dog teeth?"

"Wait a minute, you kill it...... When you kill it, show me its teeth, and I'll study them carefully. The word kill came out of Lyma's mouth, making her feel a little embarrassed, and she turned and walked towards Totekchaski so as not to see the bloody scene.

"How do you kill it?" Pang Xiaonan brought the rabbit up to Lewis and asked for his opinion.

"Either give it a knife and make it happy. Lewis made a motion to wipe his neck, which meant that he directly stabbed the rabbit in the neck, causing it to bleed to death.

"This guy wasted so much of our physical strength, and he was so fierce, I don't think he can afford it. Pang Xiaonan looked at the rabbit with a smile, wanting to make you fierce.

"What do you want?" Lewis also smiled, he didn't expect Pang Xiaonan to be so cruel.

"What do I want?" Pang Xiaonan suddenly raised his hand, lifted the rabbit's leg into the air, and then smashed it to the ground.

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