Mechanistic Reasoning Two tomato varieties were grown under high salinity. Variety A maintained higher photosynthesis and biomass than Variety B. Which explanation best accounts for this difference?

Critical thinking Radish seeds were exposed to increasing salinity levels: Low salinity: 85% germination Moderate salinity: 60% germination High salinity: 20% germination Which explanation best accounts for reduced germination at high salinity?

Identifying Scientific questions Researchers investigated how varying nitrogen fertilizer levels affect the dry mass accumulation of rice plants. Which is the best scientific research question?

Scientific argumentation A student claims: “Increasing carbon dioxide always increases photosynthesis.”Researchers found photosynthesis increased only up to a certain CO₂ level. Why is the claim inaccurate?

Scientific writing style Which sentence is most appropriate for a formal scientific paper?

Mechanistic Reasoning Two tomato varieties were grown under high salinity. Variety A maintained higher photosynthesis and biomass than Variety B. Which explanation best accounts for this difference?

Bias A company tested a new growth supplement using treated plants in one greenhouse and untreated plants in another. What is the most likely source of bias?

Critical thinking Radish seeds were exposed to increasing salinity levels: Low salinity: 85% germination Moderate salinity: 60% germination High salinity: 20% germination Which explanation best accounts for reduced germination at high salinity?

Identifying Scientific questions Researchers investigated how varying nitrogen fertilizer levels affect the dry mass accumulation of rice plants. Which is the best scientific research question?

Scientific argumentation A student claims: “Increasing carbon dioxide always increases photosynthesis.”Researchers found photosynthesis increased only up to a certain CO₂ level. Why is the claim inaccurate?