The simplest life-forms on Earth have just one cell. An example of a one-celled life-form is a bacterium. These species of bacteria all cause diseases in humans. But many bacteria are not harmful, or even helpful.
oh-soufflegirl: “ Hey everyone! Here (x) is my note on Genes (it includes Mitosis, Meiosis, and the Cell Life Cycle). If you’re having a hard time reading my handwriting, feel free to send an ask my way! I’ll try my best to respond to any questions.