A ruler will not be needed due to having a graduated cylinder which can help measure the volume of liquids
These organisms convert nitrogen in the soil to ammonia, which can then be taken up by plants. This process also occurs in aquatic ecosystems, where cyanobacteria participate. After nitrogen has been fixed, other bacteria convert it into nitrate, in a process known as nitrification.
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Cancerous cell just continue to divide giving rise to mases of cells called tumor.
