Answer:
The answer is 9.
Explanation:
There are dominant and recessive genes for both the hair color gene and the gait gene in horses, B, b, T and t respectively.
If a black trotter is heterozygous that means it's genotype is going to be Bb and Tt, therefore it will possess both dominant and recessive genes for the two traits.
The allele combinations in the gametes it produces can be BBTT, BBTt, BBtt, BbTT, BbTt, Bbtt, bbTT, bbTt and bbtt .
I hope this answer helps.
 
        
                    
             
        
        
        
Answer:
Phospholipid bilayer determinates which molecules can enter or exit the cell so its purpose is to be a checker in the middle. Cell membrane determinates the structure of the cell and it is the connection to the rest that happens in a cell. 
Explanation:
Molecules can move in 2 ways: passive and active.
The only difference is the energy that is needed to do the movement.
In passive mechanisms, energy is not used, while in active transport, energy is needed. Diffusion or passive transport are moving the concentration from hight to low so the energy is not necessary. Active transport moves from low to a high concentration and it uses metabolic energy.
 
        
             
        
        
        
An adverse effects of the drugs Rocuronium, Atracurium, Tubocurarine, and Pancuronium is high or low blood pressure.
<h3>What are adverse drug effects?</h3>
Adverse drug effects are effects produced by drugs which are not what they were intended for.
Adverse effects of drugs may range from mild to severe adverse effects.
The drugs Rocuronium, Atracurium, Tubocurarine, and Pancuronium are muscle relaxant drugs.
An adverse effects of  Rocuronium, Atracurium, Tubocurarine, and Pancuronium is high or low blood pressure.
Learn more about muscle relaxants at: brainly.com/question/3660642
#SPJ12
 
        
             
        
        
        
Answer:
it is c: Taking observations at precise intervals
Explanation: I just took the test. 
 
        
             
        
        
        
It is relative dating because no scientist can tell the actually time that the layers of rocks where formed or when the fossil began to degrade