Answer:
Cyclin is a family of proteins that controls the progression of a cell through the cell cycle by activating cyclin-dependent kinase (CDK) enzymes or group of enzymes required for synthesis of cell cycle.
 
        
                    
             
        
        
        
The answer to this question is C. URANIUM, although it is dangerous in other ways, it does not release co2
        
                    
             
        
        
        
sludge
<span>Sewage treatment is also known as wastewater treatment. It is
a process whereby contaminant is removed from wastewater. Thus, chemical,
biological and physical process are commonly used to remove contaminants from
wastewater and the by-products of wastewater treatment is usually inform of
solid waste known as sewage sludge.</span>
 
        
                    
             
        
        
        
Answer:
No
Explanation:
A renewable resource is one in which the rate at which its being replenished is higher than the rate at which it is being used up. 
For example, the air we breathe is a renewable resource because it doesn't get used up as we draw it. 
- If the rate of drawing down a ground water supply exceeds the rate of its recharge, then such a water source is non-renewable. 
 
        
             
        
        
        
The microscope. It allowed for scientists to observe the tiny parts of cells since they are not visible to the naked eye.