Gel electrophoresis can't be used for uncharged or neutral molecules, because the movement of the charged particles only make this happen
        
                    
             
        
        
        
Answer:
The correct answer would be group D- 809 kg.
It can be explained with the help of pyramid of biomass.
Pyramid of biomass represents biomass or the amount of organic or living matter present at each trophic level in an ecosystem.
The amount of organic matter is usually expressed in grams per meter square (g/m²). 
There are usually four trophic levels in the pyramid of biomass: primary producers, primary consumers, secondary consumers, and tertiary consumers.
Usually, the biomass decreases as we go up the trophical levels specially in  terrestrial ecosystem. Inverted pyramid can be observed in case of aquatic ecosystem (biomass of phytoplanktons is less than that of herbivores). 
Here, maximum biomass (809 kg) belongs to the group D and hence, it would belong to primary producers.
 
        
             
        
        
        
Answer:
greenhouses= desert
terrace forming=mountains
alley cropping= rain forest
hydroponics=desert
Explanation:
 
        
                    
             
        
        
        
The answer is C because it’s something that can be caused by speciation, not can cause it
        
                    
             
        
        
        
Answer:
Induction, in embryology, process by which the presence of one tissue influences the development of others.