Biology, Volume One, Grade One, What is an organic matter?
The organic matter was an important concept in biology. The organic matter generally contained carbon and could be burned. It was a kind of big molecular substance. Common organic matter included sugar, fat, protein, and acid. For example, in the knowledge related to green plants, through the experiment of green leaves producing organic matter under light, it was known that starch was a product of photosynthesis, and starch was an organic matter. At the cellular level, the fibers in the cell wall, the protein and fat in the cell membrane, and the DNA in the nucleus were all organic substances. These organic substances played an important role in the life activities of organisms and the construction of plants. Read more exciting novels for free
What are the knowledge points and skills of organic matter in the second year of biology?
The relevant knowledge points of organic matter in biology in Grade Eight were as follows: 1. ** Concept and Type ** - The term organic usually referred to carbon-containing compounds, but some simple carbon-containing compounds, such as carbon dioxide (CO), carbon dioxide (CO2), carbonates, and carbonides, were usually classified as inanimate because their properties were similar to those of inanimate substances. The common organic substances in the body were sugar, fat, protein, and nuclei. 2. ** Sugar-based ** - ** composition and classification **: Carboids are composed of carbon, hydrogen, and oxygen. They are generally divided into monosomes, disomes, and glycans. Monosomalose was a sugar that could no longer be digested, such as glucose (C H Chi O), which was the main energy material needed for cell life activities. Frucose was also a simple sugar, a simple sugar unique to plant cells. Disaconids are formed by the condensation of two molecules of simple sugar, such as cane sugar (composed of glucose and glucose), glucose (composed of two molecules of glucose), and glucose (composed of glucose and glucose). Polyose was a kind of big molecular sugar formed by the dehydration condensation of many simple sugar molecules. The starch in plants was an important kind of glycan, which was the material used to store energy in plant cells. Cellulose was also a glycan, which was the main component of plant cell wall and played a supporting and protective role in plant cells. Glycogen in animal cells was the glycan used to store energy in animal cells, which was mainly distributed in the liver and muscle. - [Identification method: When starch meets with iodination, it turns blue. Iodine solution can be used to identify the existence of starch.] When reducing sugar (such as glucose, etc.) and Fehling's reagent were heated in a water bath, they would produce a brick-red deposit, which could be used for the identification of reducing sugar. 3. ** Fat * - Fatty is composed of three elements: carbon, hydrogen, and oxygen. The content of hydrogen in its molecules is relatively high, and the content of oxygen is relatively low. Fat was a good energy storage material in cells. It could be broken down to provide energy when needed for life activities. Fat also had the functions of heat insulation, heat preservation, buffer, and pressure reduction. For example, the fat under the skin of animals could serve as heat preservation, and the fat around the internal organs could serve as buffer and pressure reduction to protect the internal organs. - ** Identification method **: Fat can be dyed orange by the dye solution of Sultan III and red by the dye solution of Sultan IV. 4. ** protein ** - ** Constitution and structure **: The basic building block of a protein is an aa, and there are about 21 aa that make up a protein. The general structural formula of an amine acid was that a central carbon atom was connected to an amine group (-NH2), a starch group (-COOx), a hydrogen atom, and a side chain group (R group). The R groups of different kinds of acids were different. Many of the protein molecules were dehydrated and condensed to form a protein chain. One or more of the protein chains were coiled and folded to form a protein with a certain spatial structure. - ** Function Diversity **: The protein is the main bearer of life activities and has many functions. For example, some protein is an important material that forms the structure of cells and organisms, such as feathers, hair, spider silk, etc., which are mainly composed of protein; some protein has the function of catalyze, such as the protein of the protein; some protein has the function of transport, such as the protein of the protein of the protein of - ** Identification method **: The protein will react with the biuret reagent and produce a purple reaction. 5. ** Nucleic acid ** - Nucleic acid is a substance that carries genetic information in cells. It plays an extremely important role in the inheritance, mutation, and protein synthesis of organisms. Nucleic acid was divided into two types: DNA and DNA. DNA was mainly found in the nucleus, and there was also a small amount of DNA in the mitochondria and plastids. DNA was a big molecular made up of DNA, while DNA was a big molecular made up of Ribonetides. Each Ribonetides was made up of a nitrogen base, a pentagon sugar, and a phosphorous acid. - ** Identification method **: The two stains, methylethyl-green and pyrone-red, have different affinities for DNA and DNA. methylethyl-green makes DNA appear green, and pyrone-red makes DNA appear red. Techniques to learn these knowledge points: 1. ** Construct Knowledge Network **: Construct a complete knowledge network of the types, composition, structure, function, and identification methods of organic matter. This will help to systematically understand and remember. 2. ** Comparisons **: Comparing different types of organic substances, such as the similarities and differences between sugar, fat, and protein in terms of composition elements and functions, and the differences between DNA and DNA in terms of composition, structure, and distribution. 3. ** Practice **: Link the knowledge of organic matter with daily life, such as the relationship between nutrients in food and organic matter, the relationship between human health and organic matter such as protein and fat, etc. This can deepen the understanding and memory of knowledge. 4. [Experiment Understanding]: Understand the nature and identification methods of organic substances through experiments, such as personally conducting experiments on reducing sugar, fat, and protein. Grasp relevant knowledge during the experiment. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Biology Combined Practice, Seventh Grade Volume 1
He only found the answers to the seventh grade's comprehensive biology exercises, but he did not know the specific practice content. If you need answers to the seventh grade biology comprehensive exercises, you can refer to the 2021 biology comprehensive exercises seventh grade comprehensive exercises, the 2023 comprehensive exercises Gansu seventh grade biology, the 2023 comprehensive exercises Gansu seventh grade biology, the 2023 comprehensive exercises Gansu seventh grade biology, the 2022 comprehensive exercises Gansu seventh grade biology, the 2022 comprehensive exercises Gansu seventh grade biology, the 2022 comprehensive exercises Gansu seventh grade biology, the 2022 comprehensive exercises Jiangsu education edition. In 2021, the supporting comprehensive practice of biology in the seventh grade of Gansu Province was obtained. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Jellyfish, Biology, Volume One, Eighth Grade
Jellyfish belonged to the coelenterate species and had the typical characteristics of the coelenterate species, such as the body's radiation symmetrical, the surface of the body had stinging cells, and there was a mouth but no anus. In terms of its relationship with humans, jellyfish was edible and had high nutritional value. In terms of reproduction, coelenterate animals (including jellyfish) could reproduce by growing buds. The buds grew into small jellyfish and then shed from the mother to live independently. In the structure of the jellyfish, there were stinging cells in the outer layer. The stinging cells contained thorns and venom, which were sharp weapons for attack and defense. The movement and digestion of jellyfish were related to the commonality of coelenterate. For example, in terms of digestion, the endomorph formed a digestive cavity that was connected to the mouth. Food and digested residue were passed in and out of the mouth. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Biology Grade 7, Volume 2, Visual Mind Map
The formation of vision: Light first passes through the retina (the front part of the outer membrane, colorless and transparent), then through the pupil (the central part of the iris, the iris can adjust the size of the pupil), then the light reaches the crystalline lens (the double lens, the curvature can be adjusted to see different objects at different distances), then through the glass body (transparent gel material), and finally forms an image on the retina (the inner membrane, which has a large number of photosensory cells that can sense light stimulation). After receiving the image information, the photosensory cells on the retina were excited. The excitement was transmitted to a specific area of the cerebral hemisphere through the optical nerve, and finally, vision was formed. In terms of structure, the eyeball was composed of the outer membrane (including the retina and the retina), the middle membrane (including the iris and choroid), the inner membrane (retina), and the contents (crystalline lens and vitreal body). These structures worked together to achieve visual function. From the perspective of the nervous system, the retina's photosensory cells acted as sensors to sense light stimulation and produce nerve impulses (excitement). The optical nerve acted as an incoming nerve to transmit the impulses. A specific area of the cerebral hemisphere acted as the nerve center, processing the transmitted information to form the feeling of vision. This could roughly be used as the content of the mind map for the visual part of the seventh grade biology book. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Natural biology experience, third grade volume 1
" Natural Biology Experience " Nature was a world full of wonders and mysteries. There were a variety of creatures in it, and they all had unique charms. In nature, there are tall trees. They are like giants, sheltering us from the wind and rain. In spring, the trees would grow new branches and leaves. They were tender green and full of vitality. In the summer, the dense branches and leaves brought coolness to people. There might even be birds building nests on the trees. The birds chirped as if they were singing. In autumn, the leaves would turn golden, fiery red, and other colors, like butterflies falling from the trees. It was very beautiful. In winter, some trees were still standing strong even though they only had bare branches left. Flowers were also beautiful creatures in nature. They were colorful, red like fire, pink like clouds, and white like snow. The shapes of the flowers were also different. Some were like trumpets, while others were like stars. Bees and butterflies often flew among the flowers. Bees were busy collecting honey, while butterflies seemed to be playing among the flowers. Bees collect honey to make sweet honey. This process is very difficult, but it also makes us feel the mutual dependence between creatures. The small animals were also very interesting. For example, small ants. Although they were small, they were very united. They moved food together. A small ant might not be able to move a large piece of food, but many small ants could work together to move food back to the ant nest. There were also little rabbits. They had long ears and were jumping around. They were very cute. They fed on grass and lived in the grass. They were very vigilant and would quickly run away at the slightest movement. In nature, every creature had its own meaning and value. Together, they constituted a rich and colorful world. We should protect nature, protect these creatures, and not destroy their homes, so that we can always appreciate the beauty and magic of nature. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
The content of the second volume of the seventh grade biology report
Here are some content suitable for the second volume of the seventh grade biology handwritten report: ** 1. Blood transfusion and blood type ** 1. Blood type: discovered by Austrian scientist Karl Landsteiner, it has hereditary characteristics. 2. The principle of safe blood transfusion: Generally, the principle of blood transfusion of the same type is followed. However, in an emergency, patients with type A blood could slowly transfuse a small amount of type O blood. For healthy adults, donating 200 - 300 milliliters of blood each time would not affect their health. For voluntary blood donation, they had to meet the conditions of being 18 - 55 years old, healthy, and voluntary. There were also requirements for weight, blood pressure, pulse, and so on. ** 2. Digestive System ** 1. [Constitution: Composed of digestive tract and digestive gland.] 2. "Small intestine: It is the main place for digesting food and absorbing nutrients. There are digestive juices such as intestinal juice, intestinal juice, bile, and so on. Amylum is broken down into glucose here, protein is broken down into aa, and fat is broken down into fatty acid and glycerine." 3. The liver is the largest digestive gland in the human body. It secretes bile. Bile does not contain digestive hormones, but it has a significant increase in the digestive ability of fat. ** 3. Regarding the respiratory system ** 1. Lungs: The main organ of the respiratory system, the structure that completes the exchange of gases. 2. The throat is the passage through which gas and food pass, connecting the digestive system and respiratory system. 3. Tracheal: There is a C-shaped cartilaginous support on the wall, and phlegm can be formed in the trachea. ** 4. Blood composition and hormones ** 1. Pituitaries: can secrete growth hormones. If the secretion is too little, dwarfism will occur. If it is too much, giantism will occur. 2. Knowledge related to the role of various cell components in the blood could also be included in the handwritten report. ** 5. Cell aspect ** 1. Plant cells: The basic structure includes the cell wall (support, protection), cell membrane (control of the entry and exit of substances, protection), the plasma (liquid, mobile, there are vesicles inside, and many substances are dissolved in the vesicles), the nucleus (storage and transmission of genetic information), and the plastids (the site of photosynthesis). 2. [Animal cells: For example, oral cells have cell membranes (which control the entry and exit of substances), nuclei, and other structures.] He could also add some interesting little knowledge related to biology, stories of biologists, or explanations of some biological phenomena to make the handwritten report richer. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Seventh grade, volume one, biology summary article
The following is a summary of the first volume of biology in the seventh grade: 1. Cell structure 1. ** Plant Cell ** - The outermost layer was the cell wall, which played a supporting and protective role. - The inner side of the cell wall was the cell membrane, which was thin and difficult to see under an ordinary optical microscope. It could separate the internal substances from the external environment and maintain the stability of the internal environment. - Inside the cell membrane was a colorless, transparent, jelly-like substance. There were mitochondria (cylindrical), plastids (oval, usually found in the green part of the plant's cells, which contained the green content of the leaves), and vesicles (there were many small vesicles in the young cells, and as the cells grew, they combined to form a large central vesicle. The cell fluid in the vesicle dissolved a variety of substances. The color of petals was related to the cyanidins in the cell fluid, and the color of cyanidins changed with the ph). - In the center of the cell, the nucleus was almost spherical. In young cells, the nucleus was located in the center. In mature plant cells, the nucleus was located in the thin layer of the plasma outside the central vacuole. 2. ** Animal cells ** - The outermost layer was the cell membrane, and its function was similar to the cell membrane of plant cells. - The plasma was located between the cell membrane and the nucleus. It was also a colorless, transparent, and jelly-like substance. There were mitochondria in the plasma. - The nucleus was located in the center of the cell, resembling a sphere. 3. ** Cell structure comparison between animals and plants ** - The similarities were that they all had cell membranes, a nucleus, and a mitochondria. - The difference was that plant cells had cell walls, vesicles, and plastids, while animal cells did not. ** 2. Cell Division and Growth ** 1. ** Cell division process ** - Animal cells: The cell membrane caved inwards from the middle of the cell, constricting into two cells. - Plant cells: A new cell membrane and cell wall form in the center of the original cell, splitting into two cells. - The law of cell division: The relationship between the number of cells after division n and the number of divisions m is m = 2. 2. ** Genetic material changes during cell division ** - Chroomes were made up of DNA and protein, and they were the carriers of genetic material. When a cell divided, the chopstick would duplicate. During the division process, the chopstick would be divided into two parts with the same shape and number, which would enter the two new cells. The new cell and the original cell had the same shape and number of chopstick, and the genetic material contained in them was also the same. - The cell division and growth rate of an organism were affected by environmental conditions. For example, tree rings were formed by cell division and growth rate due to different climates. In agricultural production, providing suitable conditions can promote cell division and growth of crops to increase yield. ** 3. Grappies and Reptiles (Take lizards as an example)** 1. ** Living habits and structure of lizards ** - Living on land, the body is divided into five parts: neck, torso, and limbs. There is a neck behind the head, and the head can be turned flexibly. Its four limbs were short, and it crawled close to the ground. Dry skin, covered with horny scales, can protect the body and reduce moisture. 2. ** Breath and procreate ** - Breathing with the lungs. The lungs were more developed than frogs, and their gas exchange ability was stronger. Their body temperature was not constant, and they were considered to be warm-blooded. - The method of fertilisation was internal fertilisation. The fertilized egg was produced on land. The fertilized egg was larger, and the egg contained a lot of nutrients and a certain amount of water. The egg was protected by a tough eggshell, and reproduction and development were free from the dependence on the water environment. 3. ** Main characteristics of reptiles ** - The body surface is covered with horny scales or armor, breathing with the lungs, body temperature is not constant, limbs are short or no limbs crawl. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Eighth grade, first volume, biology, boys 'development
Incomplete reaction of organic matter
There were many situations where organic matter did not completely react. The following were some of the relevant manifestations: 1. ** Incomplete combustion reaction ** - The carbon in organic matter (especially in the case of the carbon dioxide) has a negative valency, and it is oxided by oxygen during combustion. When there is insufficient oxygen (incomplete combustion), C will only be oxided to 0, and black carbon (C) will be produced. The products of incomplete combustion can continue to react with oxygen (without adding a catalyst). In addition to the possibility of carbon being produced by incomplete combustion, when organic matter contains elements such as N, the incomplete combustion products may also include NO, N O, etc. 2. ** Incomplete reactions in organic chemistry (side reactions)** - Most organic chemical reactions were complicated and often accompanied by side reactions. For example, under 70 atmospheric pressure, a catalyst, and 170 - 200 ° C, the air was used to produce sulfuric acid, but there were still by-products such as Formic acid and Propionic acid. This indicated that it was often difficult to completely follow the ideal reaction in order to obtain a single product in an organic reaction. There were cases where incomplete reactions led to the formation of multiple products. When writing an organic chemical reaction equation, one couldn't use an equal sign like an organic chemical reaction. Instead, one had to use an arrow because one only needed to write the main products in the reaction, and it was difficult to write all the products. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
The most important unit of biology in the second volume of the seventh grade
There was only one unit in the second volume of biology in the seventh grade--people in the biosphere. This unit could be divided into three parts. The first part was the first chapter," The Origin of Man ". Through various teaching activities, students were guided to understand the origin and development of human beings, ontogeny and development, the characteristics of puberty development, and the cultivation of hygiene habits. The second part includes chapters 2, 3, 4, 5 and 6. With the human physiological activities as clues, students will understand the way human physiological activities proceed, the basic anatomical structure of the human body, and form a biological perspective on the adaptation of structure and function. At the same time, it will penetrate the biological perspective on the dependence, adaptation and influence of human life activities on the biosphere environment. The third part was Chapter 7," The impact of human activities on the biosphere." It focused on activities such as case analysis, simulation exploration, and planning to guide students to understand the close relationship between humans and the environment, emphasizing that people in the biosphere should protect the biosphere. This unit was not just about human biology. It was about putting the human body in the context of the biosphere or living environment to guide students to analyze and understand human biology or the relationship between human activities and the environment. It was a comprehensive science of human biology, human psychology, and environmental biology. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>