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.
A semi-viscous fluid in which iron filings are suspended, may be poured onto the exposed platter of a hard drive, so that the patterns of bits on the platter are revealed by the alignment of the iron filings. Iron filings are also used to fortify enriched foods for human consumption. However, it is known that pure iron in its metallic form is not processable by the human body, it will simply be excreted. In the acidic environment of the stomach iron will be oxidized, producing an equivalent amount of hydrogen.