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The life of a eukaryotic cell can be explained as a cell cycle. Mitosis and cell division happens in the M phase that lasts for only about 1 h. This is followed by the G1 phase where G stand for gap, then the S phase S stand for synthesis, during that time the chromosomal DNA is replicated and at last the G2 phase in that the cells prepare for mitosis. Eukaryotic cells in culture classically have cell cycle times of 16-24 h but the cell cycle time can be much longer than > 100 days for some cells in a multicellular organism. Most of the variation in cell cycle times occurs by differences in the length of the G1 phase. Some cells in vivo like neurons, stop dividing totally and are said to be quiescent locked in a G0 phase.
From Molecules to the First Cell The prebiotic conditions on the earth in all probability were volcanic eruptions, lightning and heavy rains. There was no trace of free oxygen
What is the evolutionary importance of the emergence of seeds in the plant kingdom? The evolutionary significance of the seed is related to the plant capability of distant colo
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The left atrium is a thin walled cavity. Most of the wall is smooth. Musculi pectinati are present only in the auricle of the atrium. The interatrial septum separates the cavity of
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Explain the Escherichia - Characteristics of Bacteria? It belongs to order Enterobacteriales. It is the best-studied organism present in the colon of humans and other warm-bloo
Define Protein Requirement at Different Stages of Life Cycle? Methods of Estimating and Assessing Protein Requirements at Different Stages of Life Cycle In this section, we
CARBOHYDRATE METABOLISM Carbohydrates are broken down into monosaccharides which are absorbed into the blood stream. In the liver and muscles, most of the glucose is
Define Male and Female Ascaris Lumbricoides? Ascaris lumbricoides unlike most free-living nematodes and a large number of parasites of plants and animals are not tiny or micro
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