Answer:
I think it is the variable.
Explanation:
DNA, Chromosomes, Nucleus, Cell, Organism
Explanation:
DNA makes up the Chromosomes, which are stored in the nucleus, which is the brain of the cell, and cells make up organisms.
The pituitary gland secretes a hormone called antidiuretic hormone (ADH) which reabsorbs water in the kidney from the urine
In order to prevent/detect cervical cancer early, all girls/women should have a pap smear (or the fancy name of Papanicolau smear) every 3 years after they begin having intercourse or at the age of 21, regardless of sexual activity.