First blank is barb fish 
And the second blank is newts
        
                    
             
        
        
        
I think the correct answer from the choices listed above is option A. Sickle cell disease is caused by a change in allele. It is a disorder of the blood caused by an inherited abnormal hemoglobin. Hope this answers the question. Have a nice day.
        
             
        
        
        
The machine found no kidney stones and the patient is healthy 
        
             
        
        
        
Answer: 
C. 100% of the offspring will be red-eyed and 100% of females will be carriers.
Explanation:
          XR        XR
Xr    XRXr   XRXr
Y     XRY    XRY
C) 100% of the offspring will be red-eyed, and 100% of the female offspring will be carriers.
 
        
                    
             
        
        
        
Answer:
microscope's condenser
Explanation:
The microscope's condenser is a substage lens that concentrates light on the specimen.
<em>The condenser of a microscope is a structure that helps concentrate light rays from the light source to illuminate the specimen on the stage of the microscope. It is made up of a system of lens that converges the ray of light and an aperture diaphragm that can be used to control the amount of light that gets to the specimen on the stage of the microscope.</em>