Answer:
A. Producers
Explanation:
Each level higher reduces by 10% so the bottom will have the most biomass.
 
        
             
        
        
        
Answer:
O H20 and CH4, but not O2
Explanation:
Compounds consist of multiple elements. O2 is just two oxygen atoms, meaning two atoms from the same element.
 
        
             
        
        
        
Your ugly, no offense your weird no offense
 
        
                    
             
        
        
        
There are three and they are the Atmosphere, lithosphere, and hydrosphere
        
             
        
        
        
A model organism is a species that has been widely studied to understand a particular biological phenomena, normally used because they are easy to breed and maintain in a laboratory setting and has certain experimental advantage.
The criteria that Thomas hunt Morgan was looking for include; the model organism should be small in size, easy to keep in the laboratory and also able to produce large number of off springs in a short time.