biology contest high school

The high school biology interview could be prepared from the following three aspects: 1. [Familiar with the teaching materials: This is an indispensable part.] Familiarizing himself with the teaching materials would allow him to quickly understand the teaching content when he received the interview questions. 2. ** Preparing lesson training **: To reach the level of preparing lesson for mock interviews. 3. ** Trial lecture training **: It is not enough to only design the teaching content without training. The teaching design needed to be presented in a lecture format, and it had to be proficient and off-script. If the lecture wasn't smooth enough in the early stages, he could write down every sentence to help practice. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>

The following is a summary of the high school biology information: 1. ** Life System and Cell ** - The structure of a living system was divided into cells, tissues, organs, systems, individuals, populations, communities, and ecological systems. The cell was the basic unit of a living organism's structure and function, and it was also the most basic living system on Earth. - The fundamental difference between a procaryotic cell and a eukaryotic cell was the existence of a nucleus with or without a nuclear membrane. Prokaryonic cells have no nuclear membrane and no chopsticks, such as bacteria such as E. Coli and cyanophagia; Eukaryotic cells have nuclear membrane and chopsticks, such as yeast and so on. Viruses have no cell structure, but they have DNA or DNA. - The founders of the cell theory were Schleiden and Schwann, who revealed the unity of cells and the unity of biological structures. 2. ** Elements and compounds in cells ** - The types of chemical elements that make up cells (biological world) are roughly the same as those in the organic world, but the contents are different. The major elements in the cells were C, H, O, N, P, S, K, Ka, and MG; the trace elements were iron, Mn, B, Mn, Mo, and copper; the main elements were C, H, O, N, P, and S; and the basic element was C. The most abundant element in the dry weight of the cells was C, and the most abundant element in the fresh weight was O. - The most abundant compound in the fresh weight of the organism was water, and the most abundant compound in the dry weight was protein. Reducting sugar (glucose, glucose, glucose) can react with Fehling's reagent to form a brick-red deposit; fat can be dyed orange by Sultan III (or red by Sultan IV); starch will turn blue when it comes into contact with iodines; and protein will react with biuret reagent to produce a purple reaction. - Polymers, protein, and nuclei were biological molecules, and their components were, in turn, monocosomes, followed by monocosomes, and then monocosomes, followed by monocosomes, and then monocosomes. 3. ** Cell structure and function ** - The operation steps of the optical microscope were to focus the light → observe with a low-power objective lens → move the center of the field of view (move it to the side) → observe with a high-power objective lens (you can only adjust the fine focal spiral, adjust the large aperture, and adjust the concave mirror). - Eukaryotic organelle had different functions and structures. For example, mitochondria and plastids had their own characteristics, and they had something in common. Prokaryotic cells and eukaryotic cells had cell membranes and plastids, which reflected unity. - There were specific changes in the DNA in the nucleus during mitosis, and there were different sources and destinations of ATP. 4. ** Photosynthesis and Breathing ** - The light reaction and dark reaction in photosynthesis could be compared. At the same time, the relationship between light energy utilization rate and photosynthesis efficiency should be clarified, as well as the relationship between external factors affecting photosynthesis and improving light energy utilization rate. - The process of cell breathing involved the metabolism of the three major nutrients in human and animal bodies. 5. ** Genetic Information ** - The carriers of genetic information were the nuclei, including DNA and R A. They played an important role in genetic variation and protein synthesis. There were differences in distribution, dyeing agents, chain number, bases, pentasugar, composition units, and representative organisms. - The basic unit of a protein was an aa. The R groups of different aa in the general structural formula were different. The aa formed a peptidic bond through dehydration condensation to form a peptidic chain. The protein's variety stemmed from the differences in the type, number, and order of aa, as well as the folding method of the peptidic chain. The protein had the functions of structural protein, catalyst, transportation carrier, information transmission, immunity, and so on. 6. ** Other aspects of living beings ** - In biological tissues, reducing sugar, fat, protein, and DNA could be identified, but sugar cane could not be used as the reducing sugar identification material. The Fehling reagent had to be prepared and used immediately (different from the biuret reagent). - In an ecosystem, the stability of resistance and the stability of resilience were not absolutely inverse. There were special situations such as the Arctic tundra. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>

In the reference materials, it was mentioned that the address of Luohe Jinxiu Qiancheng School was on the second floor of Shijifeng Lifestyle Supermarket (Liaohe Road Store) in Luohe Licheng District, and Bohang Education School was located in Luohe E-commerce Secondary Professional School (North Campus) in Luohe Yuanhui District. However, he was not sure if these two schools were specialized high school biology training schools. He only knew that these two schools were recruiting high school biology teachers. The address of other Luohe High School Biology Training School was not mentioned in the reference materials, so I can't give an accurate answer. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>

The contact number of Jinbo Education Kunge Campus in Qibin District of Hebi was 400 - 0929 - 858. The school had coaching and training courses for high school biology and other subjects. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>

Biology was a subject that studied life phenomena and the composition, structure, function, growth, development, reproduction, and so on. It was one of the branches of the natural sciences and was closely related to chemistry, physics, mathematics and other disciplines. The research content of biology was very broad, including cell biology, molecular biology, ecology, genetics, developmental biology, biochemistry, and so on. Through the study of biology, we can understand the origin and evolution of life, the structure and function of living things, the relationship between living things and environmental factors, the adaptability and variety of living things, and so on. Biology is also widely used, not only to help us better understand nature, but also to provide scientific basis for many fields such as medicine, agriculture, environmental protection, biotechnology and so on. For example, biological research in the field of medicine can help us better understand the origin and mechanism of diseases and better treat patients; biological research in the field of environmental protection can help us better understand the functions and mechanisms of the ecosystem and better protect the environment. Biology is a very important subject. It can not only help us better understand nature, but also provide scientific basis and solutions to practical problems in many fields. We should strengthen the study of biology to better protect nature and contribute to the future development of mankind.

Weifang's high school biology teaching had many characteristics. In terms of teaching philosophy, it focused on combining teaching activities with biology literacy. Biology literacy covered four aspects: life concept, rational thinking, scientific inquiry, and social responsibility. In the teaching process, the construction of life concept emphasized the construction of biological concepts in practice to deal with biological problems in life; rational thinking required teachers to simplify teaching steps and guide students to form rational thinking and judgment in the classification and integration of teaching content; The cultivation of social responsibility was permeated through the study of relevant knowledge in the classroom, such as advocating fewer and better students in the study of genetic diseases, cell cancer, and environmental protection in the study of ecological systems, so that students could establish correct concepts. In terms of teaching model, practice class was an important class in high school biology teaching. The most efficient biology exercise class teaching model was to understand the common types of questions in the corresponding knowledge points, summarize the question-solving skills, master the question-solving skills through examples, and consolidate the question-solving skills with relevant practice questions. For example, in the calculation of energy flow in an ecosystem, according to different types of questions,(For example, deriving the producer from the highest nutritional level, deriving the highest nutritional level from the producer, and calculating the energy distribution ratio when the energy distribution ratio is known). Then, he summarized different question-making skills, and then selected typical and time-effective examples for the students to master. Finally, he selected practice questions that were slightly more difficult than the examples from the college entrance examination questions in Shandong Province and the final examination questions in various cities and gradually increased the difficulty within the scope of the students 'ability. In addition, Weifang would also hold teaching and research activities in the biology discipline. For example, on December 10 - 11,2019, the Weifang City implementation of the new curriculum standard classroom teaching demonstration activity was held in Qingzhou Experimental Middle School. Experts and teachers from many counties and cities participated and displayed wonderful biology classrooms. Among them, the teachers recommended by Qingzhou Experimental Middle School performed well, which also verified the leading role of the school's teaching reform. Moreover, such an activity would also help to promote the overall level of biology teaching in Weifang. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>

High school biology experiments mainly involved observing the distribution of DNA and DNA in cells, as well as the rough extraction and identification of DNA. In the experiment to observe the distribution of DNA and DNA in cells: - The principle was to use the methylate-green pyronine dye solution to dye DNA and R A. The methylate-green dye solution made the DNA appear green, and the pyronine dye solution made the R A appear red. From this, it could be observed that DNA was mainly distributed in the nucleus (dyed green), and R A was mainly distributed in the plasma (dyed red). - For the selection of materials, oral cells or onion inner skin cells (colorless) were often used to avoid color interference. - The effects of the reagents in the experiment: 0.9% NaCl-solution (physiological salt solution) could maintain the normal form of oral cells;8% sulfuric acid could change the cell membrane's penetrability, accelerate the dye to enter the cells, and also separate the DNA and protein in the embryos, which was beneficial to dyeing; the methyla-green pyronine dye solution needed to be mixed and used immediately. In the DNA extraction and identification experiment: - The principle was as follows: - DNA and protein had different degrees of dissolution in different concentration of NaCl-solutions. - DNA was not dissolved in alcohol, but some of the protein in the cells was dissolved in alcohol, which could be used to further separate DNA and protein. - The DNA turned blue after being heated in a boiling water bath. - Operation process: - The materials were selected from biological tissues with relatively high DNA content. Take chicken blood as an example. When breaking the cells, the chicken blood cells were mixed with distilled water, stirred with a glass rod, and then filtered with gauze to collect the filtered liquid. - The impurities were removed by controlling the concentration of the NaCl-solution to remove the impurities. - The extraction of DNA was to filter the processed solution and add a cooled 95% alcohol solution with the same volume as the filtered solution. - The identification of DNA was to add the diamidinium reagent to the solution containing DNA. After mixing it evenly, the test tube was placed in boiling water and heated for 5 minutes. If the solution turned blue, it proved the existence of DNA. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>

High school biology knowledge had a certain degree of systematic nature. There was little relationship between modules, but there were rules to follow within the knowledge points of the modules. From both vertical and horizontal perspectives, it was important to understand the relationships between the various structures and groups of organisms. For example, in the knowledge of photosynthesis, the two stages of light reaction and dark reaction were interconnected. The [H] and Ang P produced by the light reaction were involved in the dark reaction process. They were the bridge connecting the two. The O <2> produced by the light reaction was directly released in the form of molecules, while the dark reaction required the [H] and Ang P provided by the light reaction to carry out the conversion of matter and energy. In addition, in the knowledge related to genetics, there was a connection between gene expression and the performance of traits. Genes controlled the synthesis of protein through replication and translation, which in turn affected the traits of organisms. At the same time, there was a similar relationship between the various parts of the biological knowledge system. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>

High school biology content was more and more trivial. It covered the basic concepts of living things, the origin of life, cell structure and function, genetics and evolution, and ecological systems. From the relationship between elements and organisms to the compounds in cells, from the identification of various biological tissues to cell division, genetic laws, metabolism, and the reproduction and development of different organisms. Moreover, these knowledge points were often combined in the examination, which also increased the "effective scale" of knowledge to a certain extent. However, the biology questions did not change much. If one could master these knowledge points well, it would be more effective to deal with the exam. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>

The three options for studying high school biology were as follows: ** 1. Genetic engineering ** 1. ** Tools ** - As for restriction endonuciases, it was important to understand that they were mainly derived from prokaryota. Their function was to recognize specific sequences and break the phosphorous ester bond, which reflected their specialization. After cleavage, they would produce two forms of sticky ends and flat ends. - Among the DNA ligases, E. Coli DNA ligase and T4 - DNA ligase had to be distinguished. E. Coli DNA ligase could only connect the complementary sticky ends of double-stranded DNA fragments, while T4DNA ligase could connect two ends, but the efficiency of connecting blunt ends was relatively low. At the same time, he had to compare DNA ligase and DNA Polymerase. Although both of them formed a Phosphorescent Diester bond, there were differences in the target of the connection and whether or not a template was needed. - As for the carrier, it was clear that the carrier should be able to replicate and store stably in the recipient cell, have one or more restriction sites, and have marker genes. The most commonly used carrier was a plasmid. In addition, there were also Lambda Phages, animal and plant viruses, and so on. 2. ** Operating procedures ** - [Obtaining the target gene: The target gene is a structural gene that codes for a protein. Prokaryonic genes can be directly separated and obtained. Eukaryotic genes are usually synthesized by reverse transplantation and chemical synthesis.] When amplifying a target gene with the technique of DNA amplification, one had to master the principle of DNA double-strand replication. The process included steps such as heating to melt the strand, primer binding, and thermostable DNA synthesizing the complementary strand. It was also featured by exponential amplification. - ** Gene expression construction **: This is the core step. The purpose is to make the target gene stably exist, inherit, and express in the recipient cell. It was composed of the target gene, a initiator, a terminator, and a marker gene. It should be understood that the initiator was the recognition and binding site of the DNA primer, the terminator was located at the end of the gene, and the marker gene was used to identify and screen cells containing the target gene. - ** Introduction of the target gene into the recipient cell **: Different recipient cells have different methods of introduction. The most commonly used method for plant cells was the transformation method of the tube-like bacteria, and there were also gene gun and pollen tube pathway methods. The most commonly used method for animal cells was microinjection, and the recipient cells were mostly fertilized eggs. The most commonly used method for microorganisms was E. Coli, which was first treated with Ca2 + to make it a competent cell before being introduced. - ** Detection and expression of the target gene **: First, DNA molecular blotting technique is used to detect whether the target gene is inserted into the molecular DNA. Next, molecular blotting technique is used to detect whether the target gene is transcribed into the messenger acid. Finally, antigen-protein blotting technique is used to detect whether the target gene is translated into a protein. Sometimes, the biological level of the individual needs to be identified. 3. ** In terms of application **: Understand the application of plant genetic engineering in insect resistance, disease resistance, stress resistance, and quality improvement; animal genetic engineering in increasing growth speed, improving the quality of livestock products, and producing drugs; as well as the concepts of gene therapy and gene diagnosis. ** 2. Cell engineering, embryo engineering, ecological engineering, and biotechnology ** 1. He had to classify and summarize the concepts, definition, characteristics, differences, applications, etc. of each part of the content in detail and organize them into his own knowledge system. For example, for plant tissue culture and animal cell culture in cell engineering, it was necessary to clarify the similarities and differences in their principles, processes, applications, and so on. For embryo transfer, embryo division, and other technologies in embryo engineering, it was necessary to master their operational processes and significance. 2. In the process of learning, one should pay attention to the teaching materials. In addition to focusing on the bold words and chapter summary of the textbook, it was best to draw a mind map to build a knowledge framework to avoid missing knowledge points. If he was not good at generalizing, he could use some guidance materials, such as Basic Knowledge of High School Biology. At the same time, special training should be carried out to improve the accuracy and speed of solving questions through targeted exercises such as the real questions of the biology college entrance examination and the classification of test points. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>