What is a Ball Bearing? The Function of Ball Bearings. From small and large motors to car axles to electric fans and hard disc drives (HDDs), ball bearings are used in a wide array of machines for rotary motion. Ball bearings support rotary parts and reduce friction to facilitate the smooth operation of machines.
Best Answer: a) Plant cells contain large central vacuole, chloroplasts (if it is a photosynthetic plant cell) and a cellulose cell wall not found in animal cells. b) Eukaryotic cells have their chromosomes (DNA) contained in a nucleus, prokaryotic cells don't.Eukaryotic cells have a true nucleus, bound by a double membrane. Prokaryotic cells have no nucleus. The purpose of the nucleus is to sequester the DNA-related functions of the big eukaryotic cell into a smaller chamber, for the purpose of increased efficiency.
Animals, plants, fungi, and protists are eukaryotes. Differences Between Eukaryotic and Prokaryotic Cells . The difference between the structure of prokaryotes and eukaryotes is so great that it is considered to be the most important distinction among groups of organisms. The most fundamental difference is that eukaryotes do have true nuclei containing their DNA, whereas the genetic material in prokaryotes is not membrane-bound. Structure and contents of a typical Gram-positive bacterium cell (a prokaryotic cell)