Saccharides are the monomers which are combined to form carbohydrates. 
Depending on the type of carbohydrate, the monomer components can be monosaccharides, disaccharide, polysaccharide, etc.
E.g: Sucrose is a carbohydrate (specifically a dissacharide) that is made of glucose and fructose monosaccharides.
Another example is cellulose, which is a carbohydrate (specifically a polysaccharide) that is made of beta glucose monosaccharide components combined together.
        
             
        
        
        
They help convert nitrogen to nitrate which is usable by living beings. (Living beings can't use regular nitrogen)
        
                    
             
        
        
        
Answer:
Oceanic crust is thinner and denser than continental crust.
 
        
             
        
        
        
Answer:
A) habitat fragmentation makes it easier for cowbird parasitism to occur
Explanation:
It is a situation where by there is transformation of a large habitat into smaller patches with smaller total area secluded from one another by a habitat different from the initial one. 
Habitat fragmentation can be caused due geological processes which distort the physical environment. It is also casued by human activities which could lead to loss or extinction of certain species. 
Habitat fragmentation could possibly lead to loss of habitat and biodiversity. 
 
        
                    
             
        
        
        
I think it’s a living host cell so sorry if I’m wrong yw if I’m right