There are 15 students in math class.at the begning of class everyone races into class as everyone love maths.the professor takes note of the first 5 students who gets class and ranks them according to the order in which they entred as their top 5 favourite students. in how many different ways could the professor rank their top 5 students using formulla from combinations and permutations
        
             
        
        
        
Environmental science addresses recycling strategy so we utilize our natural resources efficiently. It also provides us with knowledge on how to lead an eco-friendly lifestyle
        
                    
             
        
        
        
Answer:
In insects such as cockroach, grasshopper 
Explanation:
Insects such as grasshopper has open circulatory, in them the body fluid is the hemolymph. The hemolymph does contain any respiratory pigment. It bathes the organs directly as it is pumped between open spaces in the body.
Thus, in insects, the blood and the interstitial fluid considered to be the same body fluid?
 
        
             
        
        
        
I'm pretty sure the answer is C, there are 4 nitrogenous bases involved. 
<span>1) Adenine 
2) Guanine 
3) Thymine 
4) Cytosine</span>
        
             
        
        
        
"The red blood cell<span> survives on average only 120 days. </span>Red cells<span> contain a special protein called hemoglobin, which helps carry oxygen from the lungs to the rest of the </span>body<span> and then returns carbon dioxide from the </span>body<span> to the lungs so it can be exhaled." - hematology.org</span>