Answer:
A cell wall, A large central vacuole and Chloroplasts
 
        
                    
             
        
        
        
The correct answer is A. 
Secondary growth in plants allows many woody and non woody plants to grow tall and strong. The growth basically occurs in the roots and the stems and it is controlled by lateral meristem.  Examples of non woody plants that undergo secondary growth include: carrot, potato, tuber, etc.<span />
        
                    
             
        
        
        
Answer:
I and II
Explanation:
I. irrigation of cropland   &   II. harvest of biomass for energy
 
        
                    
             
        
        
        
Release of a neurotransmitter across the synapse is triggered by the entry of Ca++ into the presynaptic axon. No Ca++ entry means no transmission across the synapse.