"As for the pine tree, its leaves are as thin as needles, the leaves have fewer stomata and the stomata are deeply sunk under the epidermis, and the surface of the leaves is protected by a layer of wax, so the transpiration is very weak, which can reduce water and heat loss, and adapt to the cold environment in winter."

Song Zhizhi explained everything clearly in two breaths, the second teacher also nodded with a smile, and the third teacher's questions began to ask.

"If a person eats more and more, but her body gradually loses weight, drinks more water, and urins more, then what can we infer that her body lacks?"

This question is different from the general question and answer questions, which are all answered in books, and are slightly more flexible and applied to real life.

The test is the student's ability to use it flexibly.

Song Zhizhi is faster, as a strong Chinese woman in her life, she has persisted in her weight loss career for more than ten years, what about carnitine, black coffee, enzyme plum, beautiful ballet, or keepkeep...... Which one hasn't been tried.

Until the end of the healthy diet structure + exercise to lose weight, you can adjust your weight at any time, and you have stepped on countless pits in the middle, which is naturally known.

"Lack of insulin!"

Song Zhizhi was sure and continued to explain.

"When the secretion of insulin in the human body is insufficient, the effect of blood sugar synthesis and blood sugar breakdown will be weakened, and as a result, the blood sugar concentration will rise above the normal value, and a part of the blood sugar will be excreted with the urine, forming diabetes. Diabetes is one of the features of diabetes; Diabetes mellitus is characterized by hyperglycemia, and typical cases may have polyuria, polydipsia, polyphagia, weight loss and other manifestations, that is, "three more and one less" symptoms. ”

The third teacher smiled and drew a tick, and almost applauded.

It's rare to know the answer and the principle, and to be able to say it without mistakes in such a tense situation.

Song Zhizhi performed very well in a few questions in a row, and Song Zhizhi gradually reassured, and the tenth question came to the hands of the second teacher again.

"The last question, not as difficult as before, Song Zhizhi, please listen, peanut shell, peanut two petals and what the seeds are developed from."

"The peanut shell belongs to the peel developed from the ovary wall, the seed is developed from the ovule, and the peanut kernel belongs to the embryo and is developed from the fertilized egg."

Song Zhizhi spoke out again without flaws, and continued to explain the detailed process of peanut development under the teacher's eyes, which is also what she learned when she first learned the basics of biology--- to understand various plants in nature.

"After pollination and fertilization of a flower, the calyx, corolla, stigma and columella all gradually wither, and only the ovary of the pistil continues to develop. During the development of the fruit, the ovary is divided into an ovary wall and an ovule, where the ovary wall develops into the pericarp. ”

"The beads inside the ovule are developed into seed coats, the zygote develops into embryos, and the fertilized polar nuclei develop into endosperm, seed coats, embryos, endosperm plus the pericarp are combined into one to become the fruit."

After that, the four teachers put down the pens in their hands and applauded, and through the crack in the door, the students watching outside opened their mouths wide and couldn't close them for a long time.

After the exam, I felt that if I couldn't pass the test, I would be even more nervous if I didn't take the test.

With such an excellent performance in front of you, where is their turn?

"Song Zhizhi, you are indeed excellent beyond your age, and the teachers here are very impressed, so I want to ask, why do you have an understanding of biology beyond the scope of your study."

"Because my dream is to study biology for the rest of my life, I want to be a scientist in the future, and if I can't do it, I have to study this, I like this, and I usually read books outside of class."

Song Zhizhi replied, everyone was more satisfied, it was good to have such a hobby at a young age and insist on it.

The first teacher smiled and clapped his hands a few more times, and was visibly full of appreciation for Song Zhizhi, and just as the other teachers asked Song Zhizhi to leave the examination room, the first teacher turned around.

"Song Zhizhi, wait a minute, I want to ask you how you are studying in extracurricular books, I want to ask you a few more questions, is it okay?"

She's really curious.

The second teacher interjected, "No, it's not okay, it's in the exam now, will this delay the time of other candidates." ”

"I know, but if you think about what the purpose of our competition is, it is to select the talents we need, since there are signs of encountering them, why not try it out, as long as you grasp one, this time the competition will not be lost, right!"

After the second teacher whispered, everyone felt that it made sense, so they stopped talking.

Song Zhizhi walked back, nodded, and waited for her question.

"Which of the following is not a living system, A. a frog, B. the epidermal cells of the frog, C. protein molecules in the epidermal cells, D. environmental factors such as water in the pond, sunlight, and the various organisms that live in the pond. Please choose! ”

This is a biology question for the first year of high school!

Song Zhizhi raised his eyes, and the other teachers also looked over, looking at them in anticipation.

"The hierarchy of living systems is cells, tissues, organs, systems, individuals, populations, communities, ecosystems and biospheres. The smallest level is the cell, and the various substances in the cell do not belong to the living system, so I choose C. ”

This is just the basics of the concept, also seen.

The first teacher's eyes brightened, yes, and then he began to gradually increase the difficulty, asked several questions about the knowledge points of the first year of high school, and found that Song Zhizhi answered them all fluently.

So I went straight to the question of the third year of high school.

"Apical meristem cells don't osmotic with environmental solutions, do they?"

"No, because the apical meristem cells are immature cells, and their water absorption [mainly] is swelling, not that there is no osmotic effect, but it is mainly swelling."

Song Zhizhi shook his head, the answer seemed to be clear to him, and the teachers' eyes completely changed for this answer, and they all drew the symbol of a five-pointed star on Song Zhizhi's name.

The people outside the door were completely confused, the one in front could barely understand, and the back didn't know what they were talking about at all, but Song Zhizhi seemed to be just talking about what to eat for dinner today.

Many students sat down with ugly faces.

Some students cried directly, tears kept falling, and the teachers who called their names outside had to be appeased one by one, the psychological quality of this group of children was still too weak, and students like Song Zhizhi were not everywhere, so they didn't have much impact on their strength rankings, what were you afraid of.

"Okay, Song Zhizhi, you can go out!" The first teacher didn't know what he was writing and lowered his head, and the second teacher opened his mouth to continue the process.

Song Zhizhi nodded and walked out directly, and the next student's face was more ugly than crying.

But he could only bite the bullet, with the experience of the panic brought by Song Zhizhi, the teacher outside directly closed the door, so that the students outside could not see the inside, and they were not afraid of seeing out of sight.

As soon as he went out, Song Zhizhi was surrounded by several classmates from the same school.