One of the most common methods to date volcanic rocks uses potassium (radioactive parent) and argon (stable daughter). Potassium is an element found in many minerals and rocks, and it normally has an atomic mass of 39.
        
                    
             
        
        
        
It would depend on what science the lab was researching/testing/studying
So if it was a chem lab it would have test tubes a Bunsen burner and chemicals
        
             
        
        
        
Answer:
Meiosis is a special type of cell division in sexually-reproducing organisms used to produce the gametes, such as sperm or egg cells. It involves two rounds of division that ultimately result in four cells with only one copy of each chromosome.
Explanation:
 
        
                    
             
        
        
        
Answer:
Option A, 
Explanation:
As per the conventional study belief’s, there were six main emotions – disgusted, happy, sad, angry, fear and afraid.  
But with the later studies conducted at Glasglow, it became important that there are primarily four major emotions i.e  Happy, Sad, Angry and afraid as it was concluded that anger and disgusted  &  fear and surprise have similar characteristics and they must be removed.  
Hence, option A