The National Finals use each middle school as a unit, and each middle school organizes its own team to the examination room according to the schedule. The next day, Lanjie rushed to the Magic City with the Sheep Middle School Competition Team. This student Jingguoju was held at the Magic City Jiaotong University. Before the start of the competition, Lei Tiangang's coaching team led the team members to become familiar with the Jiaotong University examination room.

The examination halls around the world were almost the same, and Ranjie and the others became familiar with each other at once.

"Since you are here at Jiaotong University, you must learn from Teacher Qian Xuesen's glorious deeds." Langjie put forward his needs.

Lei Tiangang made arrangements: "There are many tourists in Qian Xuesen Library. Under the guidance of the coach, you will go to study in batches."

"Okay, okay!"

"Go and go!"

The players of the Sheep's Life Competition were enthusiastic, and everyone went to Qian Xuesen Library in batches to actively learn the glorious history of Senior Qian.

"I will do my best to work with the Chinese people to build my own country and let my compatriots live a dignified and happy life."---Qian Xuesen.

Qian Xuesen's simple, sincere, and powerful words always stay in the most eye-catching location of Qian Xuesen Library.

Lanjie had learned what Mr. Qian said long ago, and he learned it again today, and his blood was boiling.

Academic rigor, engineering innovation, caring about the feelings of the motherland, and practicing their feelings with practical actions, and using master-level professional skills to serve the motherland... Mr. Qian's great achievements and every bit of life, young people like Lanjie are not too reluctant to learn more than ten thousand times.

Ranjie stood in front of Qian Xuesen's huge photo and muttered to himself: "Old Qian, the physics questions you have made are super difficult. I can't understand them at all, let alone solve them."

"Old Qian, you are one of my most respected scientists. Learn from you! I also hope you can bless me to be invincible on the road of my studies and soar on the academic path in the future!"

Langjie stayed in Qian Xuesen's library for a long time, and he studied Qian Xuesen's academic manuscripts one by one.

These academic manuscripts were written by Qian Xuesen during his academic golden period, and of course Langjie couldn't quite understand them.

Set a small goal for yourself first.

Ranger's small goal is to strive to understand Qian Xuesen's aerodynamic theory and rocket design draft as soon as possible.

"Students, it is a necessary activity to learn from Qian Xuesen, but don't relax too much. Please remember that you are here to participate in the biology competition." The coach of the Yang Zhongsheng Competition Team reminded him, the coach saw that the time was almost over, and he stopped the team and returned to the dormitory.

There was nothing to say all night. The next morning, Ranjie woke up at five o'clock as usual.

When he came to the national finals for the first time, Ranger was both impulsive and a little nervous.

At 8:30, the student's theory examination will start.

This theoretical test paper has ten questions, totaling 100 points, and the exam time is four hours.

There are no multiple-choice questions, fill-in-the-blank questions, and judgment questions, all calculation questions and short answer questions.

Ranger quickly browses the test paper and answers the questions immediately.

For the first question, please read a piece of material.

h.b?nziger once observed the blood-sucking moth (calpe        eustrigata) sucking buffalo blood in Malaysia. He originally thought that the blood-sucking moth was just sucking the blood-sinking droplets that came out of the bite of a mammal. However, when he cut his finger and exposed it to the blood-sucking moth, he found that although the blood-sucking moth immersed its kiss into the blood droplets, it did not suck the blood exposed to the surface, but instead pierced the tender flesh of the kiss into the wound and sucked the blood in h.b?nziger's body.

Among the more than 200,000 species of Lepidopteran insects, there are only four moths that have blood-sucking behavior. Moths suck blood is an extremely rare behavioral habit. Please explain the reasons why moths suck blood based on your understanding. (10 points)

Ranger fell into deep thought. Any player who advanced to the national finals should be able to conclude that the blood-sucking moths suck blood simply to obtain richer nutrition. To be specific, blood-sucking is to obtain more and better sodium.

But if you only write this sentence, you will get one or two points at most, and you will never exceed three points.

If you want to get the full mark on this question, you must give a set of self-consistent explanations and strive to achieve self-consistent within the question.

Teacher Lei has said more than once that there are many strange biological phenomena in nature that lack fossil evidence, so it is difficult for scientists to make a clear conclusion. But this does not prevent us from making bold and reasonable guesses. This type of question is an open type.

In the absence of fossil evidence, the study is mainly based on comparative behavioral science of existing species.

Ranjie boldly conjectures and reasonably speculates, and he wrote on the test paper:

As far as I know, most moths have siphon mouthparts, which can suck nectar from flowers to replenish sugar. At the same time, these moths also suck urine, sweat, and tears excreted by humans and animals, thereby replenishing sodium.

During the long evolution process, the structure and function of a few moths has undergone great changes (evolution). In addition to the standard siphon, there is also a drill bit, which is very hard, and some have a small amount of short hard hair at the end, which has the function of a file.

The kiss of this drill bit file can pierce the thicker fruit, which is quite powerful!

If a moth's kiss has the ability to pierce the orange peel, it will also have the ability to pierce the mammal's skin and absorb blood.

So the evolutionary route I speculate is: moths that absorb excretion fluid → fruit moths → bloodsucking moths!

The following is a brief diagram of the evolution stage of the bloodsucking moth I gave...

After finishing the first question, Ranjie couldn't help but sigh that nature is so wonderful!

"There are many mysteries in nature that humans have not yet studied clearly. Before deciphering them, we humans must be in awe of nature."

Langjie wrote this sentence on the paper and it was bold and black.

The original source of Lanjie's biological knowledge is a documentary from a B-funded overseas company. After watching the documentary, he will search for relevant professional documents to conduct more in-depth study.

After spending so many years of free sex with a certain B family, they have been fed until the finals of the National Competition. Langjie felt that the cost-effectiveness was very high and he would continue to flee in the future.

Calculation questions are relatively boring. Calculation questions do not test imagination, but test the depth of knowledge and calculation ability.

Question 5, Calculation Question. The most economical and effective way to control mosquitoes is to change the entire aquatic community, rather than poisoning. Similarly, to protect and develop a certain organism, we must first protect and develop the communities that coexist with them and the appropriate environment.

This involves the calculation of species diversity in communities.

Ranger fully understood the meaning of the question. Based on the Simpson model, he made the following calculation: d=1/∑i=1(ni/n)^2...

Find, d1=0.0198, d2=0.5.

‘Take it!’

‘Troubleshoot another question!’

‘The theoretical question of the National Decision for Life is not difficult!’

'As long as you are careful and careful, and use your imagination appropriately, it's fine!'

‘For the last question, please design an experiment…’

‘This experimental design question is very difficult!’
Chapter completed!