On the morning of September 21, Ding Ding Ding!

This morning, Ranger participated in the last preliminary round - the Biology Competition preliminary round.

The preliminary round of the biology competition can be said to be the easiest or the most difficult.

The simplest thing is that the question is not difficult.

The difficulty is that there are too many questions and too little time to answer questions.

This preliminary test paper has a total of 70 single-choice questions, 50 judgment questions, and 18 fill-in-the-blank questions (50 blanks), with a total of 170 points, and the answer time is 2 hours.

In other words, the candidate makes a choice, gives a hook fork, fills in a blank, and only has 40 seconds to think.

From the first multiple-choice question, Ranger felt the pressure.

1. Which of the following experimental phenomena (some are real and some are fabricated) does not conform to the knowledge we have learned about cytokinesis:

a. Anti-myosin antibodies are injected into dividing cells, causing the cessation of cytokinesis;

b. When the myosin ii gene is mutated, the cells can undergo nuclear division, but cannot cytoplasmic division;

c. Actin fibers f-actin observed under a microscope are arranged parallel to the cleavage groove;

d. Anti-actin antibodies injected into dividing cells have no effect on cytoplasmic division.

After reading the question page and four options, it will be gone in 10 seconds.

And these 10 seconds are still extensive reading, not intensive reading.

Ranger spent another 20 seconds to read carefully, thought for more than ten seconds, and then made a choice.

The questions in this biology paper are indeed not difficult. Most of them are conceptual questions, examining the students' depth and proficiency of biological knowledge.

Most biological dogs in the laboratory are engaged in manual labor, and candidates in the biology competition examination hall also work physical labor when doing biological test papers.

‘The multiple-choice questions are finished, and there is still an hour left!’

‘The judgment question is finished, there are 15 minutes left!’

‘Damn, there are only 15 minutes left!’

Langjie panicked, and there were only 15 minutes left in the exam, and he had just started to do fill-in-the-blank questions.

Question 1 of fill-in-the-blank questions: Please write down any three incompletely perverted insects, _____, _____.

‘I don’t have time to think, just write the answer!’

Thinking for a short time, I can only rely on instinctive reactions. Ranger wrote three types of insects without thinking: dragonflies, locusts, and Korean bugs.

The second question of fill-in-the-blank question: The products of fatty acid β-oxidation include ____, ____, ____.

‘I don’t have time to analyze it, just write the answer!’

Ranger wrote out the answer directly: nadhh, fadh2, acetylcoa.

The last question of fill-in-the-blank question: A couple with MN blood type gave birth to six children. Among these six children, there are three MN blood types, and the probability of two MN blood types and one N blood type is ____.

‘I don’t have time to calculate, just write the answer!’

It is impossible to write the answer directly, but you still have to calculate it with a little thought!

Ranger quickly calculated his mentality and came up with a probability: 15/256.

Ding Ding Ding!

The ringtone rang.

There was no time to check at all, so Lanjie rushed to hand over the paper.

When he returned home, Ranger was extremely pessimistic: "It's over, the preliminary exam for the biology competition was broken and it exploded!"

The number of people who register for the competition in the country is the largest, with more than 100,000 people who register for the competition in the country each year. The number of people who register for the competition in the competition in the competition in the industry is close to 100,000, and the number of people who register for the competition in the industry is the lowest, with nearly 50,000 people.

Because there are many contestants, the mathematics, physics and chemistry competition has a provincial rematch between the preliminary and national competitions, which is equivalent to two screenings entering the national competition. This model has a high fault tolerance rate. If a player performs in the preliminary competition and stumbles and advances to the provincial rematch, there is still one to two months of adjustment time. If his condition is adjusted well, he has the opportunity to enter the national competition, or even win the National First Prize and be selected for the winter camp.

There are only preliminary and finals in the biological competition. The fault tolerance rate of this competition mode is very low. If the preliminary competition explodes, there will be no more.

Ranger was depressed: "Dad, why don't you bet on the topic of the biology competition?"

Lan Jinhui was also helpless: "You think I understand everything? I really don't understand biology and can't take the biology questions. Ajie, after you finished the preliminary round of the four subject competitions, what are your plans next?"

"I want to practice long jump, and I'm about to participate in the national long jump competition. Mom and Dad, I'm full, I'm going to find Teacher Wei to practice long jump!"

After lunch, Lanjie brought his sports suit to go to the sheep, and strengthened his long jump skills under the guidance of Teacher Wei.

Waiting for the transformation of competition, the days of the first-time competition in the first round of competition are both difficult and full of expectations.

On the evening of September 24, Lan Jinhui and He Yuyi accompanied Lan Jie, and the family of three checked Lan Jie's preliminary results for the competition.

bite!

Ranger, 100 points.

"Full scores! I got the full score in the preliminary round of the competition!" Lanjie was very excited. The full score means that he would definitely advance to the semi-final round of the competition.

He Yuyi, who was full of love, was very proud: "The competition for numbers and chemical competitions are all full points, and the competition for materials is deducted by two points. In the competition for the three subjects of mathematics, physics and chemistry, you will all be qualified for the rematch. Ajie, you are so outstanding!"

Lan Jinhui was also very happy. While she was happy, Lan Jinhui also raised a question that she had to pay attention to: "As of today, Ajie, you have obtained the rematch qualification in mathematics, physics and chemistry, and you are all shortlisted for the rematch with high scores. You are definitely unwilling to give up the rematch of any of the subject competitions. In response to the preliminary round, Ajie, you mainly rely on your basic skills. Participating in the rematch and even the national competition is of course a test of basic skills."

"But it is not enough to have basic skills alone. Targeted guidance from an experienced coaching team is equally important. I think Ajie, you need to receive training from your coaching team in the mathematics, physics and chemistry competition. So how should you allocate your time and energy? This does not include sports. If sports training is included, I think Ajie, you have 48 hours a day to be enough."

"Dad, you are right. In this special period, you can only rely on theoretical extreme efficiency. You will definitely be very tired, but I am not afraid of being tired!"

"Ajie, if you have this ambition and determination, your mother and I will be relieved."

On the evening of September 25, Ranger found out the results of his preliminary biological competition.

"151 points, 1 point higher than the qualification line of the finals of 150 points. It's so dangerous, so good!" Ranger inexplicably gave birth to a strong sense of pleasure. It was also very good to crush the opponent, but it was not the most pleasant one. The most pleasant one was that he was about to lose, but suddenly he had an idea and stole the opposite home.

"The three rematch places in mathematics, physics and chemistry, plus the national sports competition, I think it is already the limit. As a result, you will have another place in the national final of the biological competition. What should I do?" The contradiction raised by Lan Jinhui yesterday became increasingly acute. He is a scholar who considers the problems more deeply and has some concerns when dealing with them.

Retired athlete He Yuyi's thinking is more straightforward: "No matter how many opponents he has, since he has signed up, he cannot withdraw from the competition. Just defeat these opponents one by one."
Chapter completed!