Science is a investigation process
        
             
        
        
        
The provided question is incomplete, the correct and complete question is as follows:
Choose the answer that best completes the sentence below.
Scientists group materials together ____________ it is easier to compare and study them that way.
A however
B but
C although
D because 
Answer:
The correct answer is - option D because.
Explanation:
Researcher and scientists tries to group material together on their similarities and difference to one another which makes it easier to study and compare various type of materials.
It is the one of major reasons to differentiate materials between groups like liquids state, gases state,  plasma state and solid state materials. One can easily see the difference and comparison is very clear on this type of grouping of materials.
Thus, the correct answer is - option D.
 
        
             
        
        
        
Answer:
yes
independent - temperature 
dependent - amount of sugar dissolved 
Explanation:
When water molecules are heated they move faster and collide more with the sugar molecules. These collisions transfer energy to the sugar molecules. Energy is needed to break bonds. The bonds holding the sugar molecules together or more likely to be broken. 
The amount of sugar dissolved is dependent on the temperature of water. 
 
        
             
        
        
        
Biological macromolecules are important cellular components, they have a wide array of functions necessary for survival and growth of living organisms. There are four major classes of biological macromolecules 
-carbohydrates
-lipids
-proteins
-nucleic acids.
        
             
        
        
        
Repeat the epinephrine injection after consulting with medical control.