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Yogita Ingle 5 years, 1 month ago
Sieve tubes are elements of phloem. They are slender, tube-like structures composed of elongated thin-walled cells, placed end to end. The main function of sieve tubes is to transport sugars and nutrients up and down the plant.
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Gaurav Seth 5 years, 1 month ago
Homopolymer has only one type of monomer repeating .'n' number of times. eg:-cellulose
Heteropolymer has two or more different type of monomers repeating a number of times in a particular sequence. eg:-proteins
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Meghna Thapar 4 years, 3 months ago
The S phase of a cell cycle occurs during interphase, before mitosis or meiosis, and is responsible for the synthesis or replication of DNA. In this way, the genetic material of a cell is doubled before it enters mitosis or meiosis, allowing there to be enough DNA to be split into daughter cells. Between G1 and S phase, three DNA damage checkpoints occur to ensure proper growth and synthesis of DNA prior to cell division. Damaged DNA during G1, before entry into S phase, and during S phase result in the expression of ATM/R protein. Interphase is divided into the first growth (G1), Synthesis (S), and the second growth (G2) phases (figure 1). The growth phases are, as you may have suspected, for the growth of the cell, during the synthesis phase the DNA replication occurs in preparation for the second growth phase.
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During interphase, chromosomes exhibit a minimum degree of condensation or coiling and are so entwined that they cannot be distinguished individually.
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Sia ? 5 years, 1 month ago
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Triploblastic animals: In triploblastic animals, cells are arranged in three embryonic layers- ectoderm, endoderm and a middle layer – mesoderm. Animals belong to Phyla Platyhelminthes to Chordata have a triploblastic organisation.
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Mycorrhiza is a symbiotic association of fungi with the root systems of some plants
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Deuteromycetes – They are otherwise called imperfect fungi as they do not follow the regular reproduction cycle as the other fungi. They do not reproduce sexually. Asexual reproduction occurs by conidia. Example – Trichoderma.
Posted by Priyadarshi Maurya 5 years, 1 month ago
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Yogita Ingle 5 years, 1 month ago
The basic structural and functional unit of a kidney is the nephron. There are more than eight lakh nephrons in each human kidney. It is made up of renal corpuscles and kidney tubules (renal tubules). The nephrons are the main regulators of the entire waste removal process from the body’s blood. It separates the different components present in the blood in order to filter it. It removes the unwanted toxic substances and waste present in the blood and adds back to the blood required molecules.
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Meghna Thapar 4 years, 2 months ago
Lysosomes are membrane-bound vesicles that contain digestive enzymes, such as glycosidases, proteases and sulfatases. Lysosomal enzymes are synthesized in the endoplasmic reticulum (ER), are transported to the Golgi apparatus, and are tagged for lysosomes by the addition of mannose-6-phosphate label. There are two types of lysosomes; secretory lysosomes and conventional ones. Conventional lysosomes are involved in the dismantling and re-cycling of various substrates presented to them through endocytocis, phagocytosis and by autophagosomes. They are responsible for returning many amino acids to the system.
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The nucleoplasm includes the chromosomes and nucleoli. Many substances such as nucleotides and enzymes, which direct activities that take place in the nucleus are dissolved in the nucleoplasm. The soluble, liquid portion of the nucleoplasm is called the nucleosol or nuclear hyaloplasm.
Nucleoplasm also called nuclear sap or karyoplasm. Other functions of nucleoplasm include the maintenance of nuclear shape and structure, and the transportation of ions, molecules, and other substances important to cell metabolism and function.
Posted by Saurav Nagar 5 years, 1 month ago
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Yogita Ingle 5 years, 1 month ago
Biomolecules are defined as any organic molecule present in a living cell which includes carbohydrates, proteins, fats etc. Each biomolecule is essential for body functions and manufactured within the body. They can vary in nature, type, and structure where some may be straight chains, some may be cyclic rings or both. Also, they can vary in physical properties such as water solubility, melting points.
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Coral reefs are important for many different reasons aside from supposedly containing the most diverse ecosystems on the planet. They protect coastlines from the damaging effects of wave action and tropical storms. provide habitats and shelter for many marine organisms. Coral ecosystems are a source of food for millions; protect coastlines from storms and erosion; provide habitat, spawning and nursery grounds for economically important fish species; provide jobs and income to local economies from fishing, recreation, and tourism; are a source of new medicines.
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Abhishek Chigareddy 5 years, 1 month ago
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