Photorespiration can decrease soybean's photosynthetic output by about 50%.  Would you expect this value to be higher or lower in wild relatives of soybeans?  Why?

What kind of results can we get from measuring O2 and CO2 production of spinach leaves in the light and dark conditions for photosynthesis? Thanks for your help

Light that the chlorophyll-a pigment uses may be measured by the solar-induced fluorescence (650-850nm). This fluorescence caused by the sun and a plant's gross primary output are correlated linearly. Why can solar induced fluorescence be used to infer net photosynthesis?

A mutant form of an Arabidopsis thaliana plant has defective chlorophyll production, such that the abundance of chlorophyll molecules in chloroplasts is 5% the normal level, and the chlorophyll molecules are on average too far apart for resonance energy transfer to occur. What will be the effect on the overall efficiency of photosynthesis in the plant? Rationalize your answer