The most common way microorganisms are grown (cultured) is in a "culture medium", a combination of carbohydrates, minerals, proteins and vitamins. A nutrient broth solution or solid agar jelly can be used as the culture medium.
GCSE Science learning topics and material for students in Year 7 to Year 11.
Bacteria and other prokaryotic cells replicate by a process known as binary fission. Cells that undergo binary fission make copies of their genetic material, then split into two daughter cells.
Stem cells are cells that have NOT yet been differentiated. They are not yet specialised. Some cells do not become specialised yet, but are called undifferentiated.
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Chromosomes carry genetic information in a molecule called DNA. A type of cell division called mitosis ensures process happens.
The exchange surfaces are important because they allow oxygen to be exchanged for carbon dioxide. This process allows the body to get the oxygen that it needs.