Example of a human karyotype: 23 pairs of homologous chromosomes (one pair is the homologous 'sex' chromosomes - in this case X and Y = a boy) III. Meiosis reduces chromosome number from diploid (2n) to haploid (n) 1 diploid cell (2n) cell becomes 4 haploid (n) germ cells (eggs or sperm).
closed plan. noun. 1. an office floor plan consisting of fully enclosed office spaces. Compare open plan.
Today the concept has its applications in the natural and social sciences. In the natural sciences an open system is one whose border is permeable to both energy and mass. In physics a closed system, by contrast, is permeable to energy but not to matter. Open systems have a number of consequences. A closed system contains limited energies.