The answer will be F planet A orbits it’s star faster than planet B
        
             
        
        
        
  Skin cells are made of proteins, water, and fat. But brain cells are only made up of amino acids, which ca make protein.<span />
        
             
        
        
        
Stretching of the atrial muscle cells releases a hormone called atrial natriuretic factor (ANF). ANF relaxes the juxtaglomerular (JG) cells of the afferent arteriole and thereby increases GFR and urine output.
 
        
             
        
        
        
Since they are not the same type they would be incompatible and this would cause you're immune system to attack the new blood cells and destroy them. Also known as ABO. Rate this the brainiest please. Thanks.
        
             
        
        
        
Answer:
Density is nearly 3 cabs per hectare
Explanation:
Given - 
There are three three intertidal regions. 
Area of each intertidal region is  hectares.
 hectares.
Number of crab in the intertidal regions are as follows - 
Intertidal region I - 7
Intertidal region I - 2
Intertidal region I - 6
Sum of crabs in all three regions is equal to 

Total area of all three intertidal regions is equal to 
 hectares
 hectares
Now density per hectare is equal to total population of crab divided by total area of all the three intertidal regions 
Density 
Density is nearly 3 cabs per hectare