<span> It compacts the DNA allowing a large amount of DNA to fit into the cell. </span>
        
             
        
        
        
False. Tropical rain forests and coral reefs each have many different species living among them. Therefore, They would have a high biodiversity. Hope this helps!
        
                    
             
        
        
        
Excitation-contraction coupling refers to the series of events that begins with the excitation of the sarcolemma in response to stimulation by a neurotransmitter, and results in the release of calcium ions from the sarcoplasmic reticulum.
Hence, option D is the 1st process that starts the excitation-contraction coupling.
 
        
                    
             
        
        
        
NOT EXACT DEFINITION: Diseases that can be passed from one living organism to the other. Two examples are flu and several STIs (such as herpes). Sorry I couldn’t think of any more :)