A.chromosomes aligning themselves at the equator. 
<h3>What distinguishing features of mitosis' metaphase?</h3>
A phase of cell division known as "metaphase" (mitosis or meiosis).Individual chromosomes are typically dispersed throughout the cell nucleus.The chromosomes of the cell condense and move toward one another, aligning in the center of the dividing cell, and the nucleus of the cell disintegrates during metaphase.
<h3>What distinguishes metaphase from other phases?</h3>
Its alignment of a duplicated chromosomes at the metaphase plate, an equatorial plate, is what gives metaphase its name.Via microtubules attached to its kinetochore, one of the sister chromatids is joined to one pole of the cell, and the other sister chromatid is associated to the other pole. 
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Coronary
arteries supply blood to the heart muscle, The left one, arises from the aorta and
feeds blood to the left side of the heart and the right one supplies blood to
the right ventricle, the right atrium, and the SA (sinoatrial) and AV
(atrioventricular) nodes, which regulate the heart rhythm.
Blockage
in this vessel result in
<span>reducing
the flow of oxygen and nutrients to the heart muscle and that can lead to a
heart attack. Atherosclerosis and arteriosclerosis are the most common causes
of heart disease.</span>
        
             
        
        
        
Answer: peristalsis
Explanation:it's the contraction and relaxation of muscles as the bolus moves down the oesophagus
 
        
             
        
        
        
Answer:
C. A low-pitched parent and a high-pitched parent have a child with a medium-pitched voice. 
Explanation:
I just took the test on edge and got it right.
 
        
             
        
        
        
Cell -> tissue -> organ -> organ system -> organism