Answer:
Option C, They allow random distribution of genetic material when a cell divides.
Explanation:
The chromatin are responsible for packaging of DNA molecule into smaller space with in a chromosome. It not only package it but also protect it from. Packaging allows for easier division of cells during mitosis and meiosis and hence prevent any kind of damage to the DNA.  
Chromosomes make recombination and random segregation of genetic material to form new cells.  Each new cell gets equal number of chromosomes 
Hence, option C is correction
 
        
             
        
        
        
Answer:
B) a higher protein to lipid ratio.
Explanation:
The cell membrane of eukaryotes is known to be a phospholipid bilayer with embedded proteins.  This implies that the first tube will contain a higher amount of lipids.
The membrane of the mitochondria is slightly different from the cell membrane in which its protein to lipid ratio is higher, containing a large number of integral proteins. 
 
        
             
        
        
        
Answer: between the second and
third finger
The correct method of removing
a glass stopper is to grasp it between the second and third finger with the
help of the thumb. If the glass stopper is stuck, you can use the tap method by
using many gentle tap and keep on turning the flask. Another technique is to put
oil or use a flame to expose it to heat.
 
 
        
                    
             
        
        
        
Explanation:
Pisciulture is the scientific study of rearing fish...
 
        
                    
             
        
        
        
people do not use water correctly and waste it