Using mobile RNAs to improve Nitrogen and Carbon assimilation in tomato Plant life, considered with special references to form and function. Plant physiology. THE STEM. 03 the tissues (fig. 118). In some cases vascular bundles are found in the cortex outside the The race to build climate resilient coral reefs Living C3 Vs C4 plants 1. Definition C3 plants are plants in which the first product formed during carbon dioxide fixation in photosynthesis contains three carbon atoms. The process occurs directly