Answer: The correct options are C and E. 
Explanation: When the rattlesnake population increases, the population of grasshopper and prairie dog are also decreases.
Both grasshopper and prairie dog are herbivores and eaten by rattlesnake. When rattlesnake population increases they feed on grasshopper and prairie dog and decrease occurs in their population. 
 
        
             
        
        
        
Answer:
The answer is between a or b
but I strongly suggest the option a.
Evolution is the answer 
 
        
             
        
        
        
Answer:
Total cholesterol score is 199
199 is high cholesterol score especially as it very close to 200. The patient should adopt diets that do not include high cholesterol food 
Explanation:
a. Firstly, we want to calculate the patient’s total cholesterol score.
To get this, we use a mathematical approach.
Mathematically; 
the total cholesterol score = HDL + TDL + Triglyceride = 62 + 77 + 60 = 199
The patient’s total cholesterol score is 199
b. As a doctor, I will advice the patient on the status of these measurements. Using the scale of cholesterol level, a measurement of total cholesterol = 200 represents a high cholesterol level. Since 199 is very close to 200, the patient is at a risk of high cholesterol levels and thus needs a dietary change. 
 
        
             
        
        
        
A. Citric acid cycle (Krebs cycle)