Answer:
objective lenses
Explanation:
objective lenses with different magnifications, screwed into a circular "nosepiece" which may be rotated to select the required lens.
 
        
             
        
        
        
Answer:
A or B
Explanation:
hope this helps please tell me if I’m wrong
 
        
                    
             
        
        
        
Answer: Tt
Why? Heterozygous mean two different genotypes, meaning you need both dominant and recessive. So Tt
Hope this helps :D