Mitochondria. The mitochondria has a variety of different functions and is therefore essential for the cell's productivity.
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Two sister chromatids are held together by the centromere
<h3>The Chromosome</h3>
The chromosome consists of 2 sister chromatids that are linked together by a structure known as the centromere.
Each of the sister chromatids carries an allele of the same gene. 
The link between the two sister chromatids is broken at the anaphase stage of the cell division when spindle fibers pull them apart towards opposite poles within the cell. 
More on the chromosome can be found here: brainly.com/question/296477
 
        
             
        
        
        
<span>The nurse will most likely observe Paget's disease on the client's medical chart. Paget's disease interferes with the body's bone tissue recycling process and results in increased blood flow around affected bones, flushing extra alkaline phosphatase and urinary hydroxyproline from the body.</span>
        
                    
             
        
        
        
Let us look at the what, why and how of studying extreme places like the deep earth and the deep space. Scientists need to figure out as to 'what' they want to look at such places, be it a new exotic creature or bio-genesis (birth of life). Unless there are several testable hypothesis constructed, such a study cannot begin. The 'why' aspect deals with the purpose of such research and expeditions. Is it of any use to the humans, or will it improve our current understanding of a phenomenon? The 'how' aspect deals with the technology and the economic assistance that can help in undertaking such a research. All these are the challenges that needed to be thoroughly considered to make such a research or expedition possible. 
 
        
             
        
        
        
Answer:
Meiosis 
Explanation:
Only reproductive cells/gametes use meiosis.