The correct answer for this question is this one: "
Mendel shows that dominant alleles always took over, while sometimes in the F2 generation recessive traits would come back. As you can see, f<span>rom the proportions of phenotypes in the offspring. Then, if given that the genes would be equal you would get 1/4 A, 1/4 B and 1/2 AB; but you often get 1/4 A and 3/4 B.</span>
        
             
        
        
        
Hey There!
Here is your answer:
Your answer is that a experiments should be controlled because the experiment could go out of control which could harm or hurt someone.
Also the definition of a controlled experiment is a part of the experiment that's not touched.
Ex: Water is your controlled experiment that's because our not doing anything to the water.
If you need anymore help just ask me!
Hope this helps!
        
             
        
        
        
Respuesta B.
Explanation:
(((First part of the small intestine))). It connects to the stomach. The duodenum helps to continue digesting food that comes from the stomach. It absorbs nutrients (vitamins, minerals, carbohydrates, fats, proteins) and water from food so that the body can use them.
 
        
                    
             
        
        
        
Answer:
Genetic drift is change in allele frequencies in a population from generation to generation that occurs due to chance events. To be more exact, genetic drift is change due to "sampling error" in selecting the alleles for the next generation from the gene pool of the current generation.Explanation:
 
        
             
        
        
        
Answer:
not enough clean oxygen being produced for us to breathe, loss of habitat for countless species causing them to possibly go extinct.