Answer:
48,XXYY syndrome 
Explanation:
48,XXYY syndrome is a chromosomal condition that causes infertility, developmental and behavioral disorders, and other health problems in affected boys and men
 
        
             
        
        
        
Answer:
D.
I remember doing a question like this in class while learning about natural selection. The 2 colorations of moth live in a habitat that originally supported the lighter variant due to the light-colored trees. When the industrial revolution began, the soot levels reversed this because the black moths were more camouflaged that the lighter ones. A way we could prove this was the amount of black dresses and dark colored clothing during the time, often due to the fact that lighter colored clothing would turn black by the time the wearer arrived home. The lighter colored moths simply died off a bit because of this.
 
        
             
        
        
        
Answer:many ways 
Explanation:
u can catch it like a regualar cold
 
        
                    
             
        
        
        
Answer:
First, it transports blood with oxygen and nutrients to cells all over the body. Second, it picks up waste products from the cells to be transported out of the body, and it takes the deoxygenated blood back to the lungs so it can regenerate.
 
        
                    
             
        
        
        
Answer:
unfortunately, if the snail is deep inside its shell it is most likely ill.