Answer: 
Since a species' chromosome count doesn't change from generation to generation, meiosis requires that the number of chromosomes in germ cells be cut in half. Meiosis, unlike mitosis, achieves this accomplishment by requiring a single round of DNA replication followed by two rounds of cell division.
 
        
             
        
        
        
Answer:
A adaptation is the action or process of adapting or being adapted
Explanation:
is mostly when a animal is adapted to something.
 
        
             
        
        
        
Answer:
1) Every planet's orbit is an ellipse with the sun at a focus. 
2) A line joining the sun and a planet sweeps out equal areas in equal time(s)
3) The square of a planet's orbital period is proportional to the cube of semi major axis of it's orbit
 
        
             
        
        
        
DNA
Nucleic Acids are the basis for the storage and transmission of hereditary information in all cells. Determines a cell's function and manufactures proteins & enzymes. Encodes instructions for making proteins and RNA. DNA stores the “operating instructions” for a cell.