The higher biodiversity in an ecosystem means that there is a greater variety of genes and species in that ecosystem. A great variety of genes and species means that the ecosystem is better able to carry out natural processes in the face of external stress. Thus, the ecosystem is more sustainable.
        
                    
             
        
        
        
Answer:
Explanation:
Mitosis is the phase of the cell cycle where the nucleus of a cell is divided into two nuclei with an equal amount of genetic material in both the daughter nuclei. It succeeds the G2 phase and is succeeded by cytoplasmic division after the separation of the nucleus.
 
        
             
        
        
        
D.  A variable or alteration to one part that affects an entire system
Explanation:
When talking about natural and physical systems, change is a variable or alteration to one part that affects an entire system. 
Systems are groups of processes that have the same overall function. There are several types of interacting components that makes up both physical and natural systems in our world.
- The part of  system is related and interconnected via the changes they undergo. 
- Changes typically causes variation or alteration of parts of a system. 
learn more: 
Biogeochemical cycle brainly.com/question/3509510
#learnwithBrainly
 
        
             
        
        
        
Protein expression refers to the way in which proteins are synthesized, modified and regulated in living organisms.
Hope this helps :D