Biology Mock Paper Dse 90%
“What does ‘homeostasis’ mean to you, in one sentence?”
“In a long-term study, a population of bacteria was exposed to a sub-lethal dose of an antibiotic. After 50 generations, the minimum inhibitory concentration (MIC) had increased 1000x. Using the theory of natural selection, explain how this occurred. (8 marks) Bonus: Provide a real-world implication beyond the lab.” biology mock paper dse
“Pens down. Pencils up for MC questions,” the invigilator, Dr. Yip, said, his voice flat as a petri dish. “You have one hour and thirty minutes. Begin.” “What does ‘homeostasis’ mean to you, in one sentence
Outside, the sun broke through the fog. She took out her phone. One new message from her mother: “Grandma’s fever broke. The antibiotics finally worked.” (8 marks) Bonus: Provide a real-world implication beyond
Megan set down her pencil. Her hand was cramping. The mock paper was finished. But as Dr. Yip collected the answer sheets, she realized something: She hadn't just answered questions. She had touched the reason biology mattered.
