Plant and animal cells. Cytoplasm. Jelly-like substance, where chemical reactions happen. In plant cells there's a thin lining, whereas in animal cells most of the cell is cytoplasm. Plant and animal cells. Nucleus. Controls what happens inside the cell.Carries genetic information. In exams don't call the nucleus the 'brain' of the cell.ytoplasm. Jelly-like substance, where chemical reactions happen. In plant cells there's a thin lining, whereas in animal cells most of the cell is cytoplasm. Plant and animal cells. Nucleus. Controls what happens inside the cell. Carries genetic information. In exams don't call the nucleus the 'brain' of the cell.
Iron is rarely found in its pure form on the surface of the earth; as it tends to get oxidized when it comes in contact with atmospheric oxygen. For this reason, most of its ores are in the form of iron oxides.
Natural generation [edit | edit source]. Iron occurs only around from bedrock to slightly above sea level (layers 1-63). However, almost all of the iron ore will be at the lower levels. On average, there are about 77 iron ores per chunk.Veins can vary in size, but the most common is 2Ã2Ã2.ron occurs only around from bedrock to slightly above sea level (layers 1-63). However, almost all of the iron ore will be at the lower levels.