Answer:
a weightlifter lifts a 20 kilogram barbell above his head
 
        
                    
             
        
        
        
<span>The best response is that it reduces the effects of fragility and skin atrophy.</span>
        
             
        
        
        
Answer:
The options are unclear but the answer is 8^2π square feet or 64π sqfeet
Explanation:
Area of a circle is denoted by: πr^2 where r is the radius of the circle. 
In this question, the diameter was given. The diameter of a circle is twice the radius. Therefore, in order to get the radius, we divide the diameter by 2 i.e. r = d/2
= 16/2 = 8 feet.
Thus, the radius = 8 feet.
Hence, Area of a circle = πr^2 
= π × 8^2 
= 64π or 8^2π sqfeet.
 
        
             
        
        
        
The molecular biology technique of reverse genetics can be useful for determining the function of a gene.
<h3>What is reverse genetics?</h3>
Reverse genetics is method use in molecular biology to determine gene function in an organism 
The procedure in reverse genetics involves modifying or certain nucleotide sequences in the DNA coding for a functional gene and then observing changes to the phenotype of the organism brought about by the modifications. 
Therefore, reverse genetics can be useful for determining the function of a gene.
Learn more about reverse genetics at: brainly.com/question/9896589
 
        
             
        
        
        
Meiosis Bc it is genetic variation and ends with 4 cells with a completely different genetic make up whole mitosis is the cell division of identical cells. It ends with two daughter cells.