What is a significant advantage of using animals with shorter life spans in research?

• A. They are more expensive
• B. They allow scientists to study disease quickly from birth to death
• C. They have identical genetics to humans
• D. They do not develop diseases

Answer: (B)

Shorter life spans let researchers watch the full course of a disease within a practical timeframe. By studying an organism from birth through its entire life, scientists can observe when diseases begin, how they progress, how interventions alter outcomes, and how aging interacts with disease—all within a single study window. This makes longitudinal, lifetime studies feasible, enabling rapid data collection and the ability to complete end-to-end observations that would take much longer with longer-lived species. That’s why the biggest advantage is the ability to study disease quickly from birth to death. The other points don’t address this practical, time-focused perspective: being more expensive, having identical human genetics, or not developing diseases aren’t inherent benefits of short lifespans.