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There will be two unicellular organisms and the cycle continues.
They go through a process called mitosis in which they make copies of their DNA and then divide into two separate organisms. And this just keeps repeating.
Multicellular organisms work like an assembly line, and if one part of a multicellular organism dies, it can be replaced, but if a part of a unicellular organism dies, the entire organism dies. The assembly line process is called specialization.
If they're not using their cell, I'm not sure what else they would be using. There's only one cell to be used. If you're asking whether there is a "breathing mechanism" within the cell, then the answer is no. Unicellular organisms don't need an extensive respiratory system like multicellular organisms. Moreover, unicellular organisms couldn't "breathe" because no organelle supports such a thing. Instead, unicellular organisms get oxygen just through diffusion. Because unicellular organisms are small, the diffusion of oxygen into the cell is sufficient for cell respiration. In contrast, larger multicellular organisms can't obtain oxygen through diffusion alone because the oxygen couldn't "get" to every cell.
Naturally, all eukaryotic organisms, unicellular and multicellular, contain ribosomes. Even eukaryotic microorganisms require ribosomes for life because ribosomes are essential in the process of gene expression.
phagocytosis is the process of aquiring nutrition in unicellular organisms
Transformation is the process in which unicellular organisms that protect themselves from extinction. A unicellular organism takes in DNA from outside and tries it on for size.
Mitosis
There will be two unicellular organisms and the cycle continues.
transformation
NO NYCgirl_1 edit: Unicellular organisms reproduce asexually but creating an exact replica of their nucleus and split in half. A very famous example of this is Ameobas. They split directly down the middle creating a clone of themselves, and therefore reproducing asexually
The process of drinking by unicellular organisms is called pinocytosis. Cells take in drops of liquid outside the cell. They take in meager drops of extra-cellular fluids.
They go through a process called mitosis in which they make copies of their DNA and then divide into two separate organisms. And this just keeps repeating.
Budding is one method unicellular organisms use to reproduce. Essentially, a daughter organism begins to grow attached to the parent and eventually separates. Both parent and daughter have identical DNA. Yeasts use this method.
Multicellular organisms work like an assembly line, and if one part of a multicellular organism dies, it can be replaced, but if a part of a unicellular organism dies, the entire organism dies. The assembly line process is called specialization.
If they're not using their cell, I'm not sure what else they would be using. There's only one cell to be used. If you're asking whether there is a "breathing mechanism" within the cell, then the answer is no. Unicellular organisms don't need an extensive respiratory system like multicellular organisms. Moreover, unicellular organisms couldn't "breathe" because no organelle supports such a thing. Instead, unicellular organisms get oxygen just through diffusion. Because unicellular organisms are small, the diffusion of oxygen into the cell is sufficient for cell respiration. In contrast, larger multicellular organisms can't obtain oxygen through diffusion alone because the oxygen couldn't "get" to every cell.
Well you see unicellular organisms are very unique in the fact that they live all on their own and move around with a flagellum or little motor, but to the point unicellular organisms carry out esscentally every function in life and they must in order to simply survive. One function is reproduction and they reproduce asexually