There are the most important features of the structure, as well as the features of the functions in which the plant cell differs from similar microscopic structural units of bacteria, fungi and animals. The study of these issues deals with the section of biology - cytology
Secondary education and schools 2024, September
Internal structure of mammals: organs, organ systems, their functioning. Classification of mammals, features of the external structure. Table "Structure and functions of the systems of internal organs of a mammal"
A mouth is a part of a river that flows into a sea, lake, reservoir, another river or other body of water. This area is characterized by the formation of its diverse and rich ecosystem. Some reservoirs have a non-permanent mouth. This is due to the fact that large streams dry up in some places. Sometimes it happens that the point of confluence of water bodies is subjected to excessive evaporation
Each river has a source - the place where it originates, and a mouth - the area of its confluence with another watercourse. Water streams that connect with the oceans, seas or lakes are the main ones, and those that flow directly into the river are called tributaries. They flow in valleys, that is, places whose relief is elongated and lowered. The point of maximum decrease is the river bed. A floodplain is a part of a valley that is constantly flooded with river water
Spain is rich in historical monuments and amazing natural attractions, among which the Tagus River occupies a special place. If you are lucky enough to spend your holidays in Spain, be sure to visit the places where this beautiful river flows
There are a huge number of rivers on our planet. All of them have a different nature of the flow, size. For example, mountain rivers differ from flat rivers in their speed of flow, bottom topography, and other parameters
The Gulf of St. Lawrence (Eng. St. Lawrence) is located off the eastern shores of the North American mainland. It was formed as a result of the confluence of the river of the same name into the waters of the Atlantic Ocean. The bay is considered the largest estuary on the planet. Estuary - the mouth of a river that is funnel-shaped and widens towards the ocean
The article tells about the modern state borders of France, the history of their formation and the impact on the current state of affairs in Europe. A brief description of the physical and geographical conditions under which the French border exists is also given
In vast areas of North America and Eurasia are mixed and broad-leaved forests. The zones of these green areas are located in the temperate geographic zone of the Earth. The list of plants that these forests are rich in includes pine and spruce, maple and linden, oak and ash, hornbeam and beech
Insects are the most diverse class of animals in terms of species composition, which differ from each other in various ways. One of them is the type of transformation in the process of individual development
Insects, examples and characteristics of which we will present today, are the largest group of all creatures that inhabit our planet. It includes about 80% of the total number of animal species. More than 1,000,000 species include such a group as insects
Our planet is divided into the Western Hemisphere and the Eastern, and this division is rather conditional. What line divides the Earth into two hemispheres? What continents and countries are in the Western Hemisphere? The answers to all these questions can be found in our fascinating article
Okinawa is the southernmost and warmest prefecture in the Land of the Rising Sun. Okinawa is made up of islands, and each island has stunning scenery to enjoy. This prefecture has an interesting culture, which was formed under the influence of foreign countries. Okinawa is also called the island of centenarians due to the peculiarities of the cuisine
The state of Alabama is located in the southeastern part of the United States and borders Georgia, Tennessee, the Gulf of Mexico and Florida. Also, its western border runs along the Mississippi River. What else should you know about this part of America, and how can it be interesting?
The popularization of knowledge in the field of astronomy today is largely facilitated by interest in astrology, horoscopes and secret knowledge. But novels such as The Map of the Celestial Sphere, or the Secret Meridian by renowned Spanish novelist Arturo Pérez-Reverte, which has been a bestseller since 2007, do not make up for the knowledge of classical astronomy. In the article we will consider the concept of the celestial sphere. And, of course, its characteristics are the celestial meridian and the equator
Everyone knows that with sexual reproduction, a new organism arises as a result of the fusion of two gametes (sex cells). Gametogenesis, or the formation of generative cells, occurs through a specific division called meiosis. What is the essence of this process, what are its stages, we will tell in this article
How often we, as adults, think that our chosen profession is not exactly what we would like to do. That is why we so want our children to choose a field of activity for which they have an inclination, and a profession that will bring them joy. Fortunately, today there are techniques that allow you to identify the inclinations of a teenager and help him with the choice of professional activities in the future. One of them is the Klimov method. Its developer and features will be discussed in the article
In order for the reader to see what is not there, the author has to “hint” at an event or situation. Such allusions are called "subtexts" - this is another ingenious trick in the vast arsenal of writer's "things". In this article we will try to briefly analyze the topic called "Subtext is …"
What are rows of homogeneous members? You will find the answer to the question posed in this article. In addition, we will tell you about what types such members of the sentence are divided into, as well as how they should be separated
In itself, the expression "hot ice" hardly fits in our heads. After all, we are used to the fact that ice, no matter if it is a small cube in a glass or a huge iceberg in the ocean, is icy. And for some reason it's hot. Let's figure out what kind of substance it is, how it turns out and conduct an experiment at home. So hot ice
Holland or the Netherlands? Many people will be puzzled by this question. Next, we will try to deal with this issue, as well as learn more about this country and its inhabitants
Among the scaly species, there are also viviparous species. For example, a common viper or a viviparous lizard: the fetus inside the mother is connected with her body by a complex system of blood vessels that provide it with the necessary nutrition and oxygen
The largest continent on our planet is Eurasia. What is the second largest continent? This article is devoted to a detailed answer to this question. After reading it, you will learn about the geographical location, climate, relief, population, rivers and lakes of this continent
Currently it is difficult to find a person who has not been trained in school. The current education system requires everyone to attend school and acquire basic knowledge. Among other things, the school educates people, instills in them a sense of beauty. This is where a significant part of a child's life takes place
Children are very interested in participating in various competitions, relay races. The event, the main idea of which is intellectual questions, will surely attract a lot of people who want to participate. Such activities will captivate both children and adults. Therefore, it is worth paying attention to them and conducting them more often, especially among middle and high school students
If you use a quiz with unusual questions when summarizing certain material in a literature lesson, this will activate the cognitive interest of schoolchildren
Anthropomorphids, or hominoids, belong to the superfamily of narrow-nosed primates. These include, in particular, two families: hominids and gibbons
One and a half million years ago, a wonderful phenomenon appeared in people's lives. This is fire… Along with the heat and light emanating from the flame came the ability to cook food, drive away dangerous animals, burn clay and melt metals. The modern world inherited an invaluable opportunity to use the fiery resource. Many objects used by people in everyday life owe their origin to the "fiery helper"
Pedagogy is a very delicate and multifaceted scientific field. In her working arsenal, there are more than a dozen teaching methods. Their application is aimed at the comprehensive development of a person, the education of a specialist with the necessary baggage of knowledge, skills and personal qualities. In this article we will talk about what the reproductive method is. What are its features, advantages and disadvantages?
Everything you need to know when preparing for an essay, test or exam. Types of text plan with examples. Writing Tips and Common Mistakes That Can Affect Grading
What is knowledge updating? At what stage of the lesson should it be carried out? Together we will look for answers to the questions posed
Any method of teaching English is good if it gives positive results. And yet, which one is better to choose?
Let's talk today about a phenomenon that makes people go crazy and that can leave them in their underwear while the magic roulette is spinning. Of course, we are talking about excitement, this is our object of study
Safety on the ice in winter must come first. Before you blink an eye, how can you be trapped in icy water
Early spring is always perceived as something unusual. After a long winter, it suddenly becomes warm, streams run merrily along the road, and the smell of a dream come true is in the air. And how on such a beautiful day to refuse to write an essay ?
In this article we will analyze one of the basic elements, with the help of which many tasks are solved. What is the definition of the height of a triangle? How to build it? You will find answers to these and many other questions in this article
Starting to take stereometry at school, not everyone can immediately orient themselves in space: it's not a plane. Sometimes even the simplest questions are confusing. For example, how many faces does a box have? This is not so easy to answer the first time, because most of us are likely to begin to count, imagining a figure in our head. In this article we will understand what a parallelepiped is. Why was it called that and how many faces does the parallelepiped have?
We are used to evaluating everything in degrees Celsius, but there are other units of temperature, for example, Kelvin, degrees Reaumur, Hooke, Newton. And if the ones just named are used only in physics, then in Celsius and Fahrenheit we measure everything in ordinary life. In this article, we will understand why Fahrenheit is needed? How to translate how to convert Fahrenheit to degrees of other temperature units?
Summer is a favorite time of the year for many people, and especially during school years, because you can forget about studying and enjoy. But upon returning to school, teachers will definitely be asked to talk about the summer holidays. How to do it, you will learn in this article
Studying time zones is a fascinating, informative and interesting activity. It is always interesting to find out where and what time, what people are doing. Not everyone thinks about what time is in the modern world? Why are there so many time zones? What is Greenwich?