The correct answer is (b.) an increase in the width of the stem. The increase in the width of the stem could be referred to as the secondary growth of the stem. Whereas the primary growth is the upward growth of the plant. 
        
                    
             
        
        
        
Are you looking for projects like experiments? 
        
                    
             
        
        
        
Each time an organism is consumed, 90% of the energy is lost as heat. that leaves only 10% for the carnivore
        
                    
             
        
        
        
Answer:
Letter D, Herpes simplex
Explanation:
Herpes simplex is caused by the herpes virus (HSV). The herpes virus can infect different parts of the body depending on the type of virus.
 HSV-1: cusses blisters around the mouth, including eyes in the case of several infections.
 HSV-2: responsible for genital infections.  
The signs and symptoms include blistering in the infecting area, itching and flu-like symptoms (fever, headache, etc.)
 
        
             
        
        
        
Answer:
d. if my hypothesis is correct, I can expect certain test results
Explanation:
To create a theory is not enough to state an assumption. Called scientific research, the practice tries, through a logical procedure, to produce tested, proven and safe scientific knowledge. This concept is based on the logic of scientific research that states that a hypothesis must be tested, because if the hypothesis is correct, certain test results can be expected. For this, some rules or phases are part of the process. And they are: observation, hypotheses, research method and conclusion.
Thus, we can conclude that among the alternatives presented, the one that best describes the logic of scientific investigation is the letter D.