The niche of grasshopper would include the plant species it eats.
Explanation:
The niche of an organism is different to that of a habitat. A niche includes the interaction between organisms and the food that they eat, whereas, a habitat is a place where organisms are provided with food, protection and shelter. 
Habitat is a place of ecosystem that involves other environmental factors like- rain, sunlight, humidity etc. So, food type eaten by grasshopper would be the description of a niche and not a habitat.
 
        
             
        
        
        
Parasitic infection because a<span> </span>parasitic<span> disease, also known as parasitosis,  and an</span>infectious<span> disease caused or transmitted by a</span>parasite<span>. Many </span>parasites<span> do not cause diseases.</span>Parasitic<span> diseases can affect practically all living organisms, including plants and mammals. 
The study of </span>parasitic<span> diseases is called parasitology.</span>
        
             
        
        
        
Answer:
1 living organisms are composed of one or more cells.
2 The cell is the basic unit of structure and organization in organisms. 
3 Cells arise from pre-existing cells.
 
        
                    
             
        
        
        
Answer:
Because older cultures of gram-positive bacteria tend to lose their ability to retain crystal-violet in the peptidoglycan of their cell walls and can be confused with gram-negative bacteria.
Explanation:
Gram staining is used to differentiate between two major groups of bacteria. Gram-positive and gram-negative, these bacteria differ in the amount of peptidoglycan in their cell walls. Gram-positive bacteria have a higher amount of peptidoglycan, which absorbs the violet crystal complex used in gram staining, staining them purple/violet. Old cultures of gram-positive bacteria tend to lose the ability to retain the violet crystal and are stained by safranine, staining them red/pink and appear to be gram-negative.
 
        
             
        
        
        
<span>The respiratory system, circulatory system, muscular system, and nervous system.
Hope this helps!:)</span>