Testable and rejectable. 
Recorded data may be quantitative or qualitative. 
        
                    
             
        
        
        
Answer:
number three is ghe real answer
 
        
             
        
        
        
Chromosome is a structure that contains DNA molecules packaged around histone proteins, therefore carries the heredity material. Chromosomes number determines whether a cell is haploid (n) or diploid (n). A diploid cell has both set of homologous chromosomes while the haploid cell has only one set. Nucleus is the cellular structure that is responsible for the localized storage of chromosomal DNA.
        
             
        
        
        
The best and most correct answer among the choices provided by the question is the fourth choice "<span>Measure the amount of energy in the phytoplankton and the amount of light entering the aquarium. Then measure the amount of energy in the phytoplankton after exposure to the light and determine the difference." </span><span>I hope my answer has come to your help. God bless and have a nice day ahead!</span>
        
             
        
        
        
Please answer please please thank you thank