Accuracy describes how well a measuring instrument determines the variable it is measuring. How close the value is to real value. The level of accuracy of measuring tool determines the detail to which it can measure. In order to be accurate in their work scientists need first select a measuring instrument that allows an appropriate measure of accuracy and then to calibrate it. Calibrating an instrument involves measuring already known quantities to check how accurately it is. In the laboratory accuracy of a test is determined when possible comparing results from the test in question with results geenrated from an established reference method.
        
                    
             
        
        
        
Answer:
Urologist
Explanation:
The person who is involved in the study of the genitourinary system of both males and female is known as the urologist.
The genitourinary system is the system of the organs which are involved in both the sexual and urinary function in the body.  The word is formed by the uro from urine and logist- for the person who studies forms the word urologist.
Thus, the urologist is the correct answer.
 
        
             
        
        
        
Answer:
(D). Disaccharide. 
Explanation:
A disaccharide can be defined as a molecule, made up of two monosaccharides. To form a disaccharide, two monosaccharides join together with the help of an O-glycosodic bond between them.
Sucrose is an example of disaccharide, which is made up by joining of fructose and glucose molecules. 
 
        
             
        
        
        
Explanation:
 When there is DNA shape mutation, one of the main things that could happend in the change of shape of the proteins, this creates a different pattern to arrange the nucleotids in the nuclei of the cells
 
        
                    
             
        
        
        
Unfortunately this question is incomplete as it is a multiple choice question. The following options are provided: 
<span>A) body cavity between body wall and digestive system
B) number of embryonic tissue layers
C) type of body symmetry
D) presence of Hox genes
E) degree of cephalization
The answer is D: presence of Hox genes
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Hox genes are a group of genes that determine the basic structure and orientation of animals.