Answer:
The answer is A
Explanation:
It is logical because the balloon lets the student see how much gas is released in the reaction. the balloon inflates with invisible air the student will normally not see.
 
        
                    
             
        
        
        
Fish, reptiles, amphibians, reptiles and mammals
        
             
        
        
        
It would be: Rr × Rr
Result of cross would be: 1RR, 2Rr, 1rr
So, it's genotypic ratio = 1:2:1
Phenotypic ratio = 3:1
Hope this helps!
        
             
        
        
        
Answer:
The correct answer to the question is D suboptimal temperatures 
Explanation:
I know trust me i took the test and got it right 229 999 0523