Question

what physiological process is most affected by the reduction in transpiration rate during drought conditions in species b?
reproduction
cellular respiration
growth
photosynthesis

Explanation:

Transpiration is the process of water movement through a plant and its evaporation from aerial parts, mainly leaves. In plants, transpiration is closely linked to photosynthesis as it helps in the uptake of water and nutrients which are essential for photosynthesis. Looking at Species B, when the transpiration rate reduces (from 12 ml/day to 5 ml/day under drought), the photosynthesis rate also drops significantly (from 28 μmol/m²/s to 18 μmol/m²/s). Reproduction is a long - term process and not directly shown to be affected by the given data. Cellular respiration (from 52 μmol O₂/g/h to 40 μmol O₂/g/h) has a smaller percentage change compared to photosynthesis. Growth is a complex process that can be affected by many factors, but photosynthesis is more directly related to the immediate change shown with the reduction in transpiration as per the data.

Answer:

Photosynthesis