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Posted by Md.Nurfida Islam 7 years, 3 months ago
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Meghna Thapar 5 years, 7 months ago
Blood clotting, or coagulation, is an important process that prevents excessive bleeding when a blood vessel is injured. Platelets (a type of blood cell) and proteins in your plasma (the liquid part of blood) work together to stop the bleeding by forming a clot over the injury. Typically, your body will naturally dissolve the blood clot after the injury has healed. Sometimes, however, clots form on the inside of vessels without an obvious injury or do not dissolve naturally. These situations can be dangerous and require accurate diagnosis and appropriate treatment.
Posted by Říý@ ?? 7 years, 4 months ago
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Gaurav Seth 7 years, 4 months ago
Turgor pressure is the pressure exerted by the cytoplasm on the cell wall.During osmosis, when the cell is placed in a hypotonic solution (solution with less solutes and higher water potential) water moves from solution into the cells. This causes the cytoplasm to build the pressure against the cell wall. This pressure is called as turgor pressure. This pressure is exerted by the protoplast against the cell wall due to the entry of water is called as pressure potential. It is the turgor pressure in the plant cells which helps the plants to be erect. As the cell walls are strong, cells do not rupture but enlarge in size to cause extension in growth.
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Yogita Ingle 7 years, 4 months ago
Functions of Proteins
- Enzymes: Enzymes mostly carry out all numerous chemical reactions which take place within a cell. They also help in regenerating and creating DNA molecules and carry out complex processes.
- Hormones: Proteins are involved in the creation of various types of hormones which help in balancing the components of the body. For example hormones like insulin, which helps in regulating blood sugar and secretin. It is also involved in the digestion process and formation of digestive juices.
- Antibody: Antibody also known as an immunoglobulin. It is a type of protein which is majorly used by the immune system to repair and heal the body from foreign bacteria. They often work together with other immune cells to identify and separate the antigens from increasing until the white blood cells destroy them completely.
- Energy: Proteins are the major source of energy that helps in the movements of our body. It is important to have the right amount of protein in order to convert it into energy. Protein, when consumed in excess amounts, gets used to create fat and becomes part of the fat cells.
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Posted by Hritik Gupta 7 years, 4 months ago
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Gaurav Seth 7 years, 4 months ago
Law of limiting Factor: (a) It was proposed by F. F. f Blackmann (1905).
(b) It states that “if a chemical process is affected by more than one factor, then its rate will be determined by the factor which is nearest to its minimal value; it is the factor that directly affects process as its quantity is changed”.
c) The rate of photosynthesis is affected mainly by the concentration of CO2 light intensity and the
temperature.
(d)As the light intensity is increased, the rate of photosynthesis increases proportionately until some other factor like CO2 or temperature may become limiting.
(e) Similarly, if the concentration of CO2 is increased the rate of photosynthesis increases until light may become a limiting factor.
Posted by Shruti Gupta 7 years, 4 months ago
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Meghna Thapar 5 years, 7 months ago
Water molecules always move from a region of high water potential (less negative) to an area of lower water potential (more negative). This is because having the solutes lowers the number of “free” water molecules in the cytoplasm. Therefore, all plant cells always have negative water potential. Solute potential (Ψs) decreases with increasing solute concentration; a decrease in Ψs causes a decrease in the total water potential. The internal water potential of a plant cell is more negative than pure water; this causes water to move from the soil into plant roots via osmosis.
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Ishita Ishita 7 years, 4 months ago
Posted by Faizan Khan?? 7 years, 4 months ago
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Yogita Ingle 7 years, 4 months ago
Plant growth regulators can be defined as chemicals which signal to regulate and control the growth of plants. They are also referred to as plant hormones or phytohormones. Plant hormones are organic compounds which are either produced naturally within the plants or are synthesized in laboratories. They profoundly control and modify the physiological processes like the growth, development, and movement of plants. In other words, plant growth regulators can accelerate as well as retard the rate of growth in plants.
Plants hormones are mainly responsible for –
- Differentiation and elongation of cells.
- Formation of leaves, flowers, and stems.
- Wilting of leaves.
- Ripening of fruit.
- Seed dormancy, etc.
Posted by Ishita Ishita 7 years, 4 months ago
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Posted by Manoj Kumar 7 years, 4 months ago
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Yogita Ingle 7 years, 4 months ago
Vernalisation is defined as the qualitative or quantitative dependence of plants on exposure to a low temperature to flower. Temperature affects flowering, metabolic activities, and germination of seeds in plants.
Example: Food plants such as wheat and barley have a ‘spring variety’ and a ‘winter variety’. The ‘spring variety’ is usually planted in the spring season. As a result, it flowers and produces grains by the end of the growing season. The ‘winter variety’, however, is planted in autumn. It germinates over winter, grows in the spring and is harvested in summer. In contrast to the spring variety, the winter variety will not flower or produce grains within the flowering season if planted in spring.
Ishita Ishita 7 years, 4 months ago
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Riya Thakur 7 years, 3 months ago
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