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.
Iron is an element. It has an atomic number of 26, and by mass, it's the most common element that makes up the Earth ... a large part of Earth's core is iron. Iron is the â¦ only element in pure iron.ompounds that form when an element such as aluminum or iron  combines chemically with oxygen are called oxides. Oxide minerals  are used to make products such as abrasives, â¦ toothpaste, cement,  and paint.