Answer:
Your answer is D) Graduated Cylinder.
 
        
                    
             
        
        
        
Answer: C 
Explanation: I took the test hoped this helped :)
 
        
             
        
        
        
<span>Gasoline contains stored chemical energy. When gasoline is burned in a lawn mower, the energy is transformed into mechanical and thermal energy.</span>
        
             
        
        
        
Noctiluca scintillans, commonly known as the sea tinkle and also published as Noctiluca miliaris, is a free-living, nonparasitic, marine-dwelling species of dinoflagellate that exhibits bioluminescence when disturbed (popularly known as mareel). Its bioluminescence is produced throughout the cytoplasm of this single-celled protist, by a luciferin-luciferase reaction in thousands of spherically shaped organelles, called scintillons. Nonluminescent populations within the genus Noctiluca lack these scintillons.
        
                    
             
        
        
        
<u>Answer</u>: predator and prey
<u>Explanation</u>:
The described graph illustrates the cycle of a predator and prey population.  The population curves for predator and prey are not synchronized with each other and their amplitudes differ. 
Changes in the prey population will not result in immediate or exactly identical changes in the predator population.
In the attached image, the red line represents the prey population and the blue the predator population. As it can be observed, when the prey population increases in size, the predator population size increases too. 
However, this increase is not of the same size and is delayed in time. The predator population will continue to increase even though the prey population has started to decrease. 
This has to do with the fact that the adult predators mated and gave birth when the food availability was still high. However, these new young individuals will not survive and reproduce due to decreasing prey. As the prey continues to decrease, more and more predators will perish. 
The same cycle will then repeat over and over again.