Junior high school entrance examination biology experiment, the cells
In the middle school biology experiment, there was an experiment that involved observing human oral cells. The main experimental steps were as follows: 1. Wipe: Wipe the glass slide and cover glass clean with clean gauze. 2. Drip: Drip a drop of 0.9% physiological salt solution in the center of the slide with a dropper to maintain the normal shape of the cells. 3. Scratch: Use a sterilized cotton swab to gently scrape the inner wall of your mouth (the purpose of gargling is to remove impurities in the mouth). 4. Painting: Put the end of the cotton swab with debris on the glass slide and smear it in the drop of normal salt solution. 5. Cover: Use tweezers to pick up the cover glass, so that one side of it first touches the water drop on the slide, and then slowly lay it flat. 6. Staining: Drop a drop of diluted solution of iodination on one side of the cover glass, and use blotting paper to suck it on the other side of the cover glass, so that the dye solution can permeate the entire specimen. In addition, when making temporary slide specimens of human oral tissues, there were some precautions, such as tilting the toothpicks and not scraping at the same place to avoid scratching the inner wall of the oral cavity; throwing the used toothpicks and blotting paper into the trash can, and wiping the experiment table clean. Read more exciting novels for free
Sichuan Guang 'an High School Entrance Examination Biology Experiment
In the biological experiment of the 2024 Guang 'an High School Entrance Examination, the operation steps were as follows: First, count the experimental instruments, wipe the cover glass and the glass slide with clean gauze, and then put the cover glass on the glass slide for easy gripping; Then, drip clear water in the center of the glass slide, tear off the lower surface of the leaf, and use tweezers to pinch a small piece of leaf skin and flatten it in the clear water; Then, gently cover the cover glass with tweezers and ask the invigilator to check; Then, he took the lens and placed it slightly to the left of the experimental table. He adjusted the light of each structure from top to bottom until he could observe a bright field of vision. Then, he asked the invigilator to check. Then, he placed the prepared mounting slide on the stage, pressed it tightly with a pressing clamp, and turned the coarse focal screw to lower the tube until it was close to the mounting slide. Then, he slowly raised the tube until he found the cell. Then, he asked the invigilator to check. Finally, he removed the slide, restored the microscope (from top to bottom), put the microscope back in its original position, cleaned and wiped the slide and cover glass, and tidied up the laboratory table to end the exam. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Junior high school biology experiment examination operation video teaching
You can search for "High School Biology Experiment Operation Video Collection" in the search engine to obtain the teaching content of the junior high school biology experiment examination video. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Changzhi High School Entrance Examination Biology
The biology subject of the 2022 Changzhi High School Entrance Examination would be tested on June 22nd from 16:10 to 17:10. The test subjects were students in the second year of junior high school. The score of the biology subject was 50 points, and their results would be included in the total score of the graduation year high school entrance examination. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
What will be the punishment for failing a junior high school biology experiment?
In the Ningde City junior high school graduation biological experiment operation examination, the examination failed, no make-up examination. Moreover, the biology experiment was part of the physical, chemical, and biology test scores in the middle school entrance examination. Although it did not account for much of the score, when the competition was fierce, a small reduction in score would affect the ranking of the test results, which would affect the chances of choosing a school from junior high to senior high. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Luzhou High School Entrance Examination Experimental Biology
In the biological experiment operation examination of Luzhou middle school entrance examination, there is the following process: First, you must count the experimental instruments, and wipe the cover glass and slide with clean gauze.(After wiping, the cover glass can be placed on the glass slide for easy gripping); Then, drip water in the center of the glass slide, tear off the lower bark of the leaf, and use tweezers to pinch a small piece of leaf bark and flatten it in the clear water; Then, use tweezers to gently cover the cover glass, and ask the invigilator to check; Then, take the glass and place it slightly to the left of the experiment table, adjust the light of each structure from top to bottom, until a bright field of vision is observed, and then ask the invigilator to check. Put the prepared slide on the stage, press it with a pressing clamp, turn the coarse focus screw to lower the tube to close to the slide, then slowly raise the tube to find the cells, and ask the invigilator to check. Finally, take off the slide, restore the microscope (restore the structure from top to bottom and put it back in place), clean and wipe the slide and cover glass, and tidy up the experiment table to complete the exam. Moreover, the experimental operation score for the biology high school entrance examination was 5 points. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Mudanjiang High School Entrance Examination Biology Answer
The following are some examples of the answers to the biology questions in the 2022 Mudanjiang Middle School Entrance Examination: 1. The following life phenomena are (), and the answer is B. Because the common characteristics of living things included the ability of living things to grow and reproduce,"spring flowers and autumn fruits" included living things such as blooming and fruiting, while "rising and falling tides","rising sun", and "continuous summer rain" did not include living things or inanimate phenomena. The biggest ecosystem on Earth is (), and the answer is C. The biosphere referred to the sum of all living things on Earth and their organic environment, including the bottom of the atmosphere, the upper part of the water sphere, and the upper part of the rock sphere. It covered many ecological systems and was the largest ecological system. The function of the mature zone of the corn root tip was (), and the answer was B. There were vessels inside the mature area of the root tip that transported water and mineral salt. The root hairs formed by the skin cells were the main parts of the root that absorbed water and mineral salt. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
2022 Junior High School Biology General Examination Paper
The following is part of the 2022 biology test questions for the junior high school academic level examination in Shen Zhen: 1. Multiple choice questions: 1. In Mr. Lu Xun's "From Baicao Garden to Sanwei Bookstore", the smooth stone well railing was not involved in the description of the scenery. The answer was B. 2. The slide specimen that could see the plastids under the microscope was fresh spinach leaves. The answer was C. 3. (About the cell physiological activity diagram), the answer is D. 4. When the cell image was observed under the low-power objective lens of the microscope, the number of cells in the field of view decreased and the field of view darkened when the objective lens was changed to a high-power lens. The answer was D. 5. There was plenty of rain during the wheat heading and filling stage. The bumper harvest of grain in our country reflected the environmental impact on living things. The answer was A. 6. The flesh cells of the Western Red Pheasant were loosely arranged, and the vesicles were large. They were rich in vitamins and sugar substances. These cells were nutritional tissues. The answer was A. 7. The answer was C. 8. In the summary of the characteristics of plants, the wrong one was mosses, and the answer was C. 9. The structure that developed into the "nucleus" of the longan was the ovule. The answer was D. 10. The measure that was not conducive to increasing the yield of vegetable greenhouses was to reduce the temperature difference between day and night. The answer was B. For the complete test paper and answers, please refer to the answers to the biology test questions of the 2022 Guangdong Junior High School Academic Level Examination. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Shaanxi 2022 Junior High School Biology Examination Paper
First, multiple-choice questions 1. The following idioms refer to living things as () - A. The mountains and rivers are unharmed (no living creatures are involved). - B. Beautiful weather (no living creatures involved). - C. The sea dried up and the rocks crumbled (no living creatures were involved). - D. Birds and flowers (Birds and flowers are biological). 2. When using a microscope (as shown in the picture) to observe the permanent section of the root apex, the relevant description is correct () - A. When the lens is contaminated, do not wipe it with your hands (use lens cleaning paper). - B. It was said that the magnifying power of the microscope was 100 times, and there was insufficient information to judge (the magnifying power was the product of the magnifying power of the eyepieces and the objective lens). - C. When observing, the object image is not clear, and it should not be rotated by a large margin.(If it is a coarse focus spiral, it should be used to fine-tune the fine focus spiral first). - D. Observed that the cells in different parts of the root tip are different (such as the cells in the meristematic zone are small and tightly arranged, and the cells in the mature zone have root hair and other structures). 3. The biosphere was the largest ecosystem on Earth. The environments of different regions and various organisms formed a variety of ecological systems. The correct description of the forest ecosystem is () - A. The forest ecosystem has many tall plants. - B. Rich species of animals and plants. - C. Humans do not play a dominant role in the forest ecosystem. - D. It has the ability to adjust the climate (for example, through the use of transpirations to adjust humidity, temperature, etc.). 4. The picture below is a diagram of four single-celled organisms. The correct description is () - A. Single-celled organisms can independently complete life activities (such as nutrition, breathing, secretion, etc.). - B. Not all are harmful organisms, some single-celled organisms are beneficial. - C. Not all organisms can photosynthesize (for example, Paramecium cannot photosynthesize). - D. Not all are animals (like Chrysanthemum is a plant). 5. The Chinese people had many popular poems, many of which could reflect the relationship between living things and the environment. The poem "Swallows fly in the mud, mandarin ducks sleep in the sand" reflected the influence of non-biological factors on living things. This non-biological factor is () - A. Microorganisms (does not fit the question). - B. The temperature (the sand warmth reflects the effect of temperature on the mandarin ducks). - C. Salt (does not match the meaning of the question) - D. Swallows (Swallows are living things, not non-living things). 6. In the following experiment, the correct description of the purpose of using the solution is () - A. To investigate the changes in the oral cavity of steamed buns was to verify that starch was decomposed in the oral cavity (not synthesized). - B. Exploring the production of organic matter by green leaves under light was to verify that green leaves produced starch under light. - C. Observing human oral cavity cells, oral cavity cells do not have plastids. Iodine solution is not used to observe plastids. - D. Observe the structure of the corn seed. Iodine solution is not used to observe the nucleus. 7. The following picture is a diagram of the structure of a bird egg. The blastoderm is () in the pictures (1) to (4)(Since there is no picture, it is impossible to accurately indicate which serial number represents the blastoderm, but the blastoderm is the part of the bird egg where the embryo develops). 8. Xixi wanted to invite a friend from another city to taste mutton buns and roujiamo. From the perspective of a reasonable diet, it should also be matched with the following () - A. Salad vegetables (can supplement vitamins, diet fiber, etc. to make the diet more reasonable). - B. Fried bread slices (high calories, unhealthy). - C. Roasted beef kebabs (repeated more with mutton buns and roujiamo, and barbecued food is unhealthy). - D. Rice noodles and cold noodles (mainly carbs, lacking vitamins and other nutrients). 9. In the experiment to explore the production of organic matter by green leaves under light, the geraniums were dark-treated, covered with black paper on the top and bottom sides of the leaves, and placed under the sun. The variable set for this experiment is () - A. Phosphor (not the experimental variable). - B. carbon dioxide (not the experimental variable). - C. Illumination (use black paper to block the light, the variable is whether there is light). - D. Water (not the experimental variable). 10. The nutrients we obtain from food provide substances and energy to maintain life and health. The role of the following nutrients does not match the example () - A. To provide substances, such as protein (Correct, protein can provide substances such as fatty acid to build the body, etc.). - B. Maintain health, such as vitamins (Correct, vitamins play an important role in maintaining the normal physiological functions of the body). - C. Maintaining life, such as water (Correct, water is a necessary substance for life activities). - D. To provide energy, such as mineral salt (Wrong, mineral salt cannot provide energy. The nutrients that can provide energy are sugar, fat, and protein). 11. In the following blood vessels of the human body, the venous blood flowing is () - A. The pulmonic artery (which flows venous blood, transporting venous blood from the whole body to the lungs for gas exchange). - B. The lung vein (the artery that carries blood back to the heart after gas exchange in the lungs). - C. The main artery (the artery that carries blood from the heart to the whole body). - D. Afferent artery (blood flowing from the artery). 12. In the exam questions activity, - A. Reflex activity (conditioned reflex). - B. Not only is the nervous system involved, but other systems such as the hormonal system are also involved in regulation (such as hormone regulation affecting brain activity, etc.). - C. It was a complex reflex (conditioned reflex), a reflex formed with the participation of the cerebral hemisphere. - D. The nerve center is located in the cerebral hemisphere (not the spinal cord). 13. If you don't have good eye habits, it's easy to develop short-sightedness. What can prevent nearsightedness is () - A. Reading under strong light (not conducive to eye health, easy to hurt the eyes). - B. Do eye exercises (can relieve eye fatigue and help prevent shortsightedness). - C. Rubbing the eyes with dirty hands (unsanitary, easy to infect eye diseases, unable to prevent shortsightedness). - D. Looking at the computer for a long time (easy to cause eye fatigue, not conducive to preventing short-sightedness). 14. Xixi accidentally pricked her finger and quickly withdrew her hand. in that course of complete the action, - A. The biceps contract (not relax). - B. Relax (not contract) the triceps. - C. Bone cannot provide energy (energy is provided by the mitochondria in the cells through respiratory action). - D. Joints act as fulcrums (bones act as leverage, muscles act as power). 15. Xixi found an "ant nest" in the yard. The way ants acquired this behavior was innate. The following animal behaviors are congenital behaviors () - [A. Parroting (Learning behavior)] - B. Police dog solving cases (learning behavior). - C. Squid spraying ink (a congenital behavior). - D. An old horse knows the way (classified as learning behavior). 16. The mosquito larva, commonly known as the somersault worm, was the larva stage of the mosquito's development from egg to pupa. The creature that has the same development process as mosquitoes is () - A. Locusts (the development process is incomplete metamorphosis, different from mosquitoes). - B. Frogs (the development process is abnormal, but not exactly the same as mosquitoes). - C. Silkworm (the development process is completely metamorphosis, the same as the mosquito development process). - D. Pigeon (a bird that develops differently from insects). 17. Microorganisms (viruses, bacteria, and fungi) were inseparable from human life. The beneficial use of microorganisms by humans is () - (1) Cause disease (harmful aspects of microorganisms). - (2) Purification of sewage (beneficial aspects). - 3. Pollution of the environment (harmful aspects of microorganisms). - (4) Food production (beneficial aspects, such as yeast used to ferment bread, etc.). - (5) Production of drugs (beneficial aspects, such as the use of microorganisms to produce antibiotics, etc.) - Hence, it was 2, 4, and 5. 18. Xixi's brother found a small animal in the farmland. If Xixi wanted to understand the characteristics and structure of the animal, she should consult relevant zoological books or biological materials (since there was no more description of the animal, she could not be more specific). 19. When Xixi was flipping through the Compendium of Materia Medica, she learned that the fruit had medicinal values such as stopping diarrhea, treating various hemorrhoids, and sore throats. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Guangdong High School Entrance Examination 2023 Biology Knowledge Points
Problems in the routine examination of junior high school biology and suggestions
The following problems may exist in the routine examination of junior high school biology and the suggested measures that can be taken: ** 1. Problems ** 1. ** Exams ** - ** Large number of questions **: For example, in the final exam of the second semester of the second year of junior high school, you need to complete 25 multiple-choice questions (a total of 50 points) and 50 small non-multiple-choice questions (a total of 50 points) within 60 minutes. There are a total of 75 questions. The time to answer them is tight. - ** Difficult to differentiate concepts **: Distinguishing the similarities and differences between different species of animals and plants such as mollusks and arthropods is a difficult part of learning and exams. It is easy to confuse concepts and lead to mistakes in answering questions. For example, when determining whether a creature belongs to the taxonomical fish, some names have the word "fish" but are not fish (such as crocodiles, dolphins, squid), while names without "fish" may be fish (such as yellow duck, loach). This is easy to confuse examinees. - ** Confusing **: Some questions test the degree of detail and analytical judgment of the knowledge. For example, the question about the breathing characteristics of pigeons in flight involves the examination of the function of air sacs. Its role in the breathing process is easily misunderstood. 2. ** Experimental teaching ** - ** Incomplete experimental equipment and materials **: Due to the limitations of the objective conditions of the school's laboratory, some experiments arranged in the teaching materials could not be carried out, affecting the ability of students to obtain knowledge through experiments. It also disappointed students because experiments were important to stimulate students 'desire for knowledge. ** II. Suggestion ** 1. ** For exams ** - [Concept learning: Create and use a mind map to distinguish the differences between various concepts. It will help you remember biological concepts, such as distinguishing between different animal and plant concepts.] - ** Answer Skills ** - ** Mark the key words **: Learn to quickly find the key words in the question (the key words). Some questions are very long, but it is easy to find the correct answer after identifying the key words. - ** Carefully and meticulously review the questions **: Answer the questions according to the requirements and pay attention to the special requirements in the questions. For example, you should clearly distinguish whether you need to fill in the structure name or the number in the answer. For the chart questions, you should pay attention to the direction of the arrow. - ** Use scientific language **: Use scientific and rigorous language when answering questions. For example, in biological experiment questions, you must accurately express the experimental conditions. Missing a word may affect the accuracy of the answer. - [Comprehensively consider the problem]: When some questions require mathematical methods to solve biological problems, comprehensive and detailed considerations should be taken into account. For example, when calculating the probability of genetic diseases, a variety of factors should be considered. 2. ** For experimental teaching **: The school should try its best to improve the equipment and materials in the laboratory. Biology teachers should actively carry out effective experimental teaching activities so that students can truly benefit from the experiment. This is because experimental teaching can cultivate students 'ability to combine theory and practice, deepen their understanding of teaching materials, and improve their biological quality. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>