Use VLOOKUP when lookup values are located in the first column of a table with information organized vertically. Use HLOOKUP when lookup values are located in the first row of a table, and each record appears in a new column. Range_lookup controls whether value needs to match exactly or not.
senescence - the organic process of growing older and showing the effects of increasing age. ageing, aging. catabiosis - normal aging of cells. biological process, organic process - a process occurring in living organisms.
Cells â except for cancerous ones â cannot reproduce forever. When aging cells stop dividing, they become âsenescent.â Scientists believe one factor that causes senescence is the length of a cellâs telomeres, or protective caps on the end of chromosomes. Every time chromosomes reproduce, telomeres get shorter. As telomeres dwindle, cell division stops altogether.