Its because a long spine cacti can reproduce more because it has more survival capacity than the short spine cacti and because of this reason the short spine cacti cannot protect it self because it has a shorter spine that could protect itself from danger. 
        
                    
             
        
        
        
B.False
Because starch is the storage form of glucose in plants, and glycogen as the storage carbohydrate in animals 
        
             
        
        
        
Microorganisms that are capable of causing disease are called pathogens. Although microorganisms that cause disease often receive the most attention, it is important to note that most microorganisms do not cause disease. In fact, many probably provide some protection against harmful microorganisms because they effectively compete with the harmful organisms for resources, preventing them from growing.
        
             
        
        
        
The carbon attached to the alpha carboxyl and the alpha amino group is known as the alpha carbon. 2. All amino acids except glycine have four different groups attached to the alpha carbon. As a result, all amino acids have at least one asymmetric center (the alpha carbon).