1) The cell is a system, because it consists of many interconnected and interacting parts – organelles and other structures.
2) The system is open, since substances and energy enter it from the environment, metabolism is carried out in it.
3) The cell maintains a relatively constant composition due to self-regulation carried out at the genetic level. The cell is able to respond to stimuli
Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.