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Diseases can be spread through various modes of transmission, including direct and indirect contact, airborne and vector-borne transmission, and through food and water. Direct contact: Direct contact involves physical contact between two people, such as through sexual contact, kissing, or touching. This is the most common mode of transmission for many infectious diseases, such as …

Modes of transmission of diseases – രോഗങ്ങൾ പകരുന്ന രീതികൾ Read More »

Pathogens are microorganisms that cause diseases in humans, animals and plants. Examples of pathogens include bacteria, viruses, fungi, and parasites. Microorganisms are tiny living organisms, including bacteria, fungi, viruses, and protozoa. patogens, paathogens

Artificial plant hormones are synthetic compounds that are used in place of, or in addition to, naturally occurring plant hormones. They are used to control or alter the growth, development, and other processes of plants, such as flowering, fruit-setting, and ripening. Examples of artificial plant hormones include auxins (e.g., indole-3-acetic acid, IAA), gibberellins, cytokinins, abscisic …

Artificial plant hormones – കൃത്രിമ സസ്യ ഹോർമോണുകൾ Read More »

Ethylene is a plant hormone that is found naturally in plants and is essential for their growth and development. It is involved in the regulation of a wide range of physiological processes, including seed germination, root initiation, stem growth, leaf abscission, fruit ripening, and stress responses. It is produced in response to various internal and …

Ethylene – എഥിലീൻ Read More »

Abscisic acid (ABA) is a plant hormone that plays an essential role in the regulation of plant growth, development, and stress responses. It is involved in the regulation of seed dormancy, leaf senescence, and the response to environmental stresses, such as drought and cold. Abscisic acid is synthesized in many plant organs, including the leaves, …

Abscisic acid – സൈറ്റോകിനിൻ Read More »

Cytokinin is a plant hormone that promotes cell division and growth, as well as differentiation of different types of cells. It works by counteracting the effects of abscisic acid, which slows growth and development in plants. Cytokinin is produced in the root tips and the shoot apical meristem, and its production is increased by light. …

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Auxin is a plant hormone involved in many plant processes, such as growth and development, cell division, phototropism, and apical dominance. Auxins are primarily synthesized in the apical meristems of shoots and roots, with some production in young leaves and flowers. They are then transported to other parts of the plant, including the roots, where …

Auxin – ഓക്സിൻ Read More »

Gibberellins are a group of plant hormones that play a major role in plant growth, development, and germination. They are involved in many different processes, such as stem elongation, cell division, flowering, seed germination, dormancy, root growth, and fruit development. Gibberellins are also known to stimulate the biosynthesis of several important plant molecules, such as …

Plant hormones : Gibberellin – ഗിബ്ബറെല്ലിൻ Read More »

Pheromones: These are chemical signals released by animals and plants to communicate with other individuals of the same species. Examples include androstenone released by male pigs to attract females, and citronellal released by queen termites to signal to others that she is the queen. Alarm substances: These are chemical signals released by some organisms to …

Chemical messages for communication – ആശയവിനിമയത്തിനുള്ള രാസ സന്ദേശങ്ങൾ Read More »

The hypothalamus is the key control centre of the endocrine system. It is responsible for coordinating the release of hormones from the pituitary gland, which is the master gland of the body. The hypothalamus sends chemical signals, called releasing hormones, to the pituitary gland when it needs to increase or decrease the release of a …

Action of hypothalamus as a prime controller – മുഖ്യ നിയന്ത്രകനായി ഹൈപ്പോതലാമസിന്റെ പ്രവർത്തനം Read More »