Question

The Pond Ecology team measured algae levels and found that sunny pond displays contain 50 times more algae than shaded pond displays. Based on this data, what’s the most scientifically sound conclusion they can draw?
Question 3 options:

This definitely proves that shade always completely stops algae growth in all situations

This strongly suggests sunlight increases algae, but testing in more locations would strengthen conclusions

The 50-fold difference is too large to be meaningful or reliable data

Sunlight always causes algae growth everywhere in the world under all conditions

Answer 1

"This strongly suggests sunlight increases algae, but testing in more locations would strengthen conclusions."

Reason: a 50× difference is strong evidence of an association, but it doesn't prove causation or universality. Replicate the finding across more sites and control for confounders (nutrients, temperature, water flow, sample timing) or run manipulative experiments to be more confident.