Answer:
Angle of light source
Explanation:
Independent variable is the variable that the experimenter changes or manipulates in an experiment in order to bring about a measurable response, which is the dependent variable. 
In this question, a student wants to investigate the effects of phototropism in bean plants. She places a light source directly above one plant, at a forty-five degree angle to another, and at a ninety-degree angle from the third. This shows that the variable being manipulated (independent variable) is the ANGLE OF THE LIGHT SOURCE.
 
        
             
        
        
        
RNA molecules are produced during transcription, the molecules being the ribonucleotides of mRNA
        
             
        
        
        
Answer:
the three domains are Eukarya Archae and Eubacteria 
Explanation:
an example of Eukarya is plants and animals 
an example of Archae is methanogens 
an example of bacteria is bacteria such as e.coli 
 
        
             
        
        
        
 A certain gene is only used for certain functions, and if that gene is always going, your body cant turn certain functions on and off, which can ultimatley lead to a lot of health problems
        
             
        
        
        
Answer:
B) A kidney malfunction that removes more water than normal
Explanation:
Just took the test :)
Also, the answer choice is worded differently for me. The alternative answer is "A kidney malfunction that removes more water than normal".