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Adaptation of plants to saline environments. 1.The salinity increases with the depth of the soil, so most of the plant roots do not go too deep into the soil but extend to the top layer of the soil. 2.It is difficult to absorb more saline water, so when the salinity decreases during the rainy season, the plants absorb water faster and store it in their parenchyma cells. Due to this, their stems, leaves and roots look a bit juicy. 3.Many plants have columnar or protruding roots to withstand the pull of water during high tide. 4.There is an air chamber inside the respiratory tract and it can hold air (O2) in the chamber. 5.In saline soils and in low tide it is difficult for seeds to survive in one place. Therefore, in many plants, seed germination begins when the plant is in the tree and long roots are formed.When the root is a little big and heavy, it falls to the ground and some mud penetrates into the ground and becomes permanent.As a result, it does not float a...

The Story -1 Joy Hassan, son of 14 years old, was called 'auta', but his sister called him 'funky'.Because of this, he is afraid of a little from childhood. But today it is not small.Absolutely sleeping, about 12 am around 30 minutes. Suddenly, a sound, his sleep broke down.Then he thought that there is someone in his room. He started shouting loudly.Everyone came running with his parents and lights the room. Then he did not see any other than his family. The Story -2 Mr. Moshiur Rahman, a businessman in profession. The pressure of the work of the work of work has increased a little. One day the office was finished in the factory visited outside the city.During the coming time, there was a lot of nights. He had to driving ihis car and suddenly there was someone behind him. But looking back, nothing looked at the back. Mr. Mr. Man was very scared. From the above events, we learned that they were only scared. But once imagine what would you do if you were in their place?T...

The importance of respiration in the life of any organism is immense. The process of respiration continues in every living cell of the plant or animal.Stopping the process of respiration means the death of the organism or the cells of that organism. The importance of respiration in plant life is briefly described below: 1. Energy supply to the organism: Energy is needed to manage every process of life (which is a feature of life), and this energy comes through the process of respiration. So the real importance of the respiratory process in the life of any organism lies in conducting all the biological processes of the organism through energy production. 2. Food preparation:  The carbon dioxide emitted in the process of respiration is used directly or indirectly in photosynthesis and produces food. Food that protects plants as well as the entire animal kingdom. 3. Mineral salt absorption : Plants play an important role in the process of respiration in the absorption...

Pavlov completed this groundbreaking study from 1891 to 1900.He used to put meat powder in the dog's mouth in a special way at a certain time every day.If meat powder was put in the dog's mouth, saliva would be excreted. This is a normal process.He would then ring the bell a few seconds before putting the meat powder in the dog's mouth.At first the dog would raise its ears when it heard the bell. But it would not salivate.From then on, when the dog rang the bell, he realized that he would be fed now, and when he heard the sound of the bell, saliva came out of his mouth.The dog became accustomed to this process and was seen salivating only when the bell rang.He saw this as a combination of physiology and psychology. Pavlov was awarded the Nobel Prize in Medicine in 1904 for his research. Any one natural stimulus can naturally create a stimulus.But if an animal is accustomed to associating a neutral stimulus with this natural stimulus, then only a neutr...