Answer:
C) Is the right answer
Explanation:
chemical reactions occur when a substance is changed into a whole 'nother substance, and cannot be changed back.
how do I know this? 
I just learned it today... UwU 
I hope this helps!!
 
        
             
        
        
        
This is false. Absolute brightness is the term used to describe how bright a star would look if it were a standard distance from Earth. Apparent brightness is how bright it would look as far as it currently is from Earth. Hope this was helpful!
 
        
                    
             
        
        
        
 Answer:
True.
Explanation:
Almost all organisms have the same codons. These codons make them unique so having the same ones means each organism has a shred of uniqueness. 
 
        
             
        
        
        
The separation of the sister chromatids during the cell division occurs in the anaphase in mitosis and anaphase II in meiosis.
During the anaphase in mitosis, and the anaphase II of the meiosis, the chromosomes aligned at the center of the nucleus separates and the sister chromatids of the chromosomes starts moving towards the opposite poles as the spindle fibers starts contracting.