Question

What can you infer about the amount of sunlight around the equator that could help explain why these areas tend to have higher concentrations of chlorophyll?

Answer 1

The sun is located directly ocver the equator therefore the most amount of sunlight would be present in this area . The plants here would use this as a way to photosyntesise more by having more chlorophyll present in leaves . The CO2 conc. , water conc. would be other factors but the amount of chlorophyll would be a direct limitation as there can always be excess CO2 and Water