Ameoba’s reproduction is an example for Binary fission.
Binary fission: Binary fission is a type of asexual reproduction in which the fully grown parent cell splits into two halves, producing two new daughter cells. It is common among organisms such as Bacteria, Amoeba and Paramecium. It takes place during favourable conditions. This method is simple and similar to mitosis.
Amoeba reproduces asexually by binary fission. At the time of binary fission the amoeba withdraws pseudopodia and becomes spherical in shape. The nucleus splits longitudinally and divides into two daughter nuclei (called as karyokinesis). These daughter nuclei move towards opposite poles. This is followed by the elongation of the parent cell. A fissure appears in the middle of the cytoplasm between the two daughter nuclei dividing the cell into two equal halves (cytokinesis). Thus, two daughter amoebae are produced from a single parent. One of them has the original contractile vacuole while the other develops a new one. The entire process of binary fission is completed in less than half an hour; but this time varies with temperature. The daughter amoebae lead an independent life; become adults and the division process gets repeated. Thus, thousands of amoebae are produced within a few days from a single parent.
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6 сен 2024