"In the pneumococcal transformation experiment conducted by Griffiths, the non-toxic R-type live bacteria were mixed with the heat-killed S-type bacteria and injected into mice. The toxic S-type live bacteria were isolated from the mice. What does this mean?"

......

This teacher must have done it on purpose. The students in the class were no longer calm and started whispering, discussing the biology teacher's unethical behavior.

Jiang Zhiyu smiled calmly. She had memorized this kind of question by heart. She said slowly, "Compared with R-type bacteria, the toxicity of S-type bacteria may be related to capsular polysaccharides; the DNA of S-type bacteria can enter R-type bacterial cells to guide protein synthesis; heating kills S-type bacteria so that their protein function is lost while the DNA function may not be affected."

The biology teacher's eyes were filled with an incredible golden light. How come Jiang Zhiyu had become more confident and knowledgeable after not seeing him for a few days? Could this be the legendary possession of another's body? ?

"Well, teacher, am I right?"

"Yes, yes." The biology teacher was slapped in the face, and she seemed to be less confident. "Sit down, Jiang."

Jiang Zhiyu’s popularity in the class is almost full. He is really omnipotent. In everyone’s mind, if Jiang Zhiyu were to participate in a biology competition, he might not necessarily win first place. . .

Lunch time finally arrived, Jiang Zhiyu touched his finger and was the first to rush out of the classroom.

In her previous life, her eyes and mind were full of studying, and she ignored too many fun things, such as eating. She has lost a lot of weight recently, and she can eat something to replenish her body.

Xu Leyun was queuing in the cafeteria. There were only a few people in front of him, but there were nearly a hundred people waiting to get food behind him. He stretched out his hand and waved to Jiang Zhiyu who was coming from a distance, "Sister Yu, come over to me quickly~"

Jiang Zhiyu walked over and said with a guilty conscience, "I feel so sorry for the students behind me for cutting in line like this."

"Oh, hey, then stop eating and go to the back." Xu Leyun always made fun of her. He looked at her with disgust and then moved forward.

"Oh!" Jiang Zhiyu rolled his eyes at him and obediently walked to the end of the increasingly long line behind him.

About five minutes later, Xu Leyun finished his meal, held a plate in one hand, and walked to the back of the line. "After all, you have to give me tutoring. How can I bear to let my lovely sister Yu wait in line?"

Xu Leyun has always been tough on the outside but soft on the inside. Jiang Zhiyu forced a smile and said, "Thank you, brother."

He subconsciously put his hand on Jiang Zhiyu's shoulder and said, "Go and get me a bowl of seaweed egg drop soup."

Xiao Zhang, who had just entered the cafeteria, was so anxious that his eyes turned red. Although Jiang Zhiyu accepted his apology, she still ignored him...

But he hangs out with this brat all the time! He was so angry that he turned around and walked out of the cafeteria, "Damn it, I'm going to have a big meal outside the school!"

It just so happened that the two of them found a seat with only a table and two chairs, and sat down opposite each other to eat. While eating, she did not forget to snatch the chicken leg from Xu Leyun's bowl and started to eat it happily.

"Sister Yu, you don't do anything..."

"kindness?"

Jiang Zhiyu was like a fierce woman in front of Xu Leyun. One look made him shudder. "I'm wrong. I'm not a human."

He Shiduo came over with a few female classmates, holding a bowl of exquisite carved hot shacha in her hands, "Sister Yu, I saw you and Xu Leyun here from a distance, go get a bowl of shacha, it's delicious."