They don't always divide, in multicellular organisms they typically just stop growing, in slime molds the cells can get more than a foot in diameter without dividing (they have tens of thousands of nuclei per cell).
the surface area available for importing nutrients and exporting wastes is no longer sufficient.
They copy their chromosomes so that when they do divide into two different cells each one will have its own set of chromosomes and it couldn't be copied and transferred after divison occured
Cells divide as the zygote becomes a fetus with growth and development into babies when born, cells also divide with growth after birth into adulthood and to replenish and renew damaged or lost cells.
Unlike most cells in an adult body, an embryonic mass of cells is always dividing. Most cells in the adult body is quiscent and will not divide unless signals have been given to them to divide, and many cells such as muscle and nerve cells have even lost the ability to divide.
cell division is how organisms grow.
Replication of DNA
Cells are in endocytosis when they are not dividing, this is just maintaing life and growth to divide again.
They copy their chromosomes so that when they do divide into two different cells each one will have its own set of chromosomes and it couldn't be copied and transferred after divison occured
Cells divide as the zygote becomes a fetus with growth and development into babies when born, cells also divide with growth after birth into adulthood and to replenish and renew damaged or lost cells.
In order to replace the cells that are dieing
Liver cells divide about once a year, and neurons (nerve cells) never divide once we are born (and when they are mature).
Cells need to get rid of large particles they don't need
Cells need to get rid of large particles they don't need
Unlike most cells in an adult body, an embryonic mass of cells is always dividing. Most cells in the adult body is quiscent and will not divide unless signals have been given to them to divide, and many cells such as muscle and nerve cells have even lost the ability to divide.
cell division is how organisms grow.
cell division is how organisms grow
Because body cells need to make genetically identical daughter cells and sex cells need to make genetically unique cells with half the genetic material of the parent cell.
Because body cells need to make genetically identical daughter cells and sex cells need to make genetically unique cells with half the genetic material of the parent cell.