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.
Some things which seem to be differences aren't. For example, the prokaryotic cell has a cell wall, and this animal cell does not. However, many kinds of eukaryotic cells do have cell walls. Despite all of these similarities, the differences are also clear.ere's a simple visual comparison between a prokaryotic cell and a eukaryotic cell: This particular eukaryotic cell happens to be an animal cell, but the cells of plants, fungi and protists are also eukaryotic. Despite their apparent differences, these two cell types have a lot in common.