A. I believe
sorry if wrong <333
        
             
        
        
        
Answer: ionotropic; metabotropic
Explanation:
A receptor can directly open the channel and exerts an ionotropic effect. The ionotropic effect takes place by the help of ionotropic receptors. These receptors are membrane bound receptor proteins which responds by the bonding of the ligand. 
Due to ligand binding the channel opens and allows the movement of ions into the cells which helps in either increasing or decreasing the action potential.
The receptors can also bind to the ligand and produce metabotropic effect which means by the second messenger.
 
        
             
        
        
        
It would be the fossils amount of mineral acidity im pretty sure!
        
             
        
        
        
Answer: Catabolism
Explanation:
The addition of electrons to the compound is called as the reduction reaction. On the other hand, the removal of electrons is called as the oxidation. 
The catabolism is a process by which electrons are removed from the compound. This is a oxidation reaction.The anabolism is a process by which electrons are added to the compound. This is the reduction reaction.
The anabolism is a process of formation of new complex substance from simple ones. This is a constructive process. The catabolism is a process of formation of simple substance from break down of complex ones. This is a destructive process.
 
        
             
        
        
        
Plants that use photosynthesis would