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Answer 1

Answer:

1.A unicellular organism, also known as a single-celled organism, is an organism that consists of a single cell, unlike a multicellular organism that consists of multiple cells. Unicellular organisms fall into two general categories: prokaryotic organisms and eukaryotic organisms.

2. The process in which the parent cell divides to form two similar daughter cells in binary fission. It takes place either by mitosis or amitosis. When there are favourable conditions and abandoned Food Supply then the organisms undergo binary fission. Prokaryotes, Protista and Eukaryotic cell organelles like mitochondria and chloroplast form binary fission.