What are unicellular organisms?

Unicellular organisms are only made up of one cell. This one cell is responsible for all the functions of the organism. Unicellular organisms can be found in both plants and animals and include things like bacteria and amoebas. One of the key differences between multicellular and unicellular organisms is that multicellular organisms are able to carry out more complex functions than unicellular organisms. This is because multicellular organisms have many cells that can work together…

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Why is meiosis necessary in organisms that reproduce sexually?

Meiosis is the process of cell division that creates gametes (sex cells) that are required for sexual reproduction. In meiosis, a cell divides twice to produce four new cells. Each new cell has half the number of chromosomes as the original cell. It is necessary because it helps all sexually reproducing organisms pass down half their genes to their offspring. Sexual reproduction also contributes to genetic diversity, which helps species evolve and adapt over time.…

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