Here are the correct sequenced items...
- largest class - <u> carbonates </u> 
- found in caves - <u> sulfides </u>
- contain oxygen - <u> oxides </u>
- contain sulfur - <u> silicates </u>
 
        
                    
             
        
        
        
Answer:
The main difference between microtubules and microfilaments is that microtubules are long, hollow cylinders, made up of tubulin protein units whereas microfilaments are double-stranded helical polymers, made up of actin proteins.
 
        
             
        
        
        
Answer:
Atoms are electrically neutral as a result of having an equal amount of positive (due to the protons) and negative (due to the electrons) charges on it. 
An ion generally is an electrically unbalanced atom (i.e an atom with a net charge on it) 
A negative ion called an anion is produced when an atom gains an extra electron from a neighboring atom, giving it an extra negative charge. This can be produced by ionization with a radioactive radiation or simply by dissolution. 
A positive ion is called a cation and it is produced when an atom loses electron to a neighboring atom. The loss of this electron causes the positive charges to outweigh the negative charges in the atom. Cations can be produced by radioactive radiation ionization of an atom or by simple dissolution. 
The subatomic particle that is negative is the 'electron'. 
 
        
             
        
        
        
Answer:
Plants
Explanation:
The cell membrane is the plants.