its d .  electron because it has a negative charge of however many there are that are circling the atom 
 
        
                    
             
        
        
        
The answer is different magnification lenses.  Leeuwenhoek use a microscope with different magnification lenses which enabled him to see bacteria. <span>His microscope was able to achieve 50-300x magnification, which enabled him to see a variety of bacteria.</span>
        
                    
             
        
        
        
Answer:
Does the organism have legs?
Does the organism reproduce asexually?
Can the organism ferment?
Is the organism infectious?
Explanation:
The questions HAVE to be yes or no, in order for it to effectively determine which species is which.
 
        
             
        
        
        
Answer: B) The mother's father must also carry the recessive allele
Explanation:
How Are Men Affected by Cystic Fibrosis? Males account for slightly more than 50 percent of all cases of cystic fibrosis (CF) but generally have better outcomes than females until about age 20.