She wrote the textbook answer: Random mutation → Some bacteria have resistance gene → Sub-lethal dose kills non-resistant → Resistant bacteria survive and reproduce → Allele frequency increases.
She turned the page.
She wrote: Homeostasis is not just about pH and temperature. It is the fragile, beautiful fight of every living system to stay alive when everything around it says fall apart. biology mock paper dse
But her grandmother’s face flashed in her mind. The ventilator. The resistant bacteria. The doctors fighting to bring her body back to balance. She wrote the textbook answer: Random mutation →
The room filled with the frantic scratching of HB pencils. biology mock paper dse