I believe it’s b but correct me if I’m wrong
        
                    
             
        
        
        
A ..................................................
        
                    
             
        
        
        
Answer:
Jessica melts 200 grams of dark chocolate that contains 60% cocoa and mixes it with 200 grams of milk chocolate that contains 30% cocoa
What is the concentration of cocoa in the resulting mixture
Explanation:
 
        
             
        
        
        
Answer:
to contract a muscle, myosin and actin filaments shorten, requiring ATP binding and hydrolysis
Explanation:
hopes it help
 
        
             
        
        
        
Answer:
tube that carries urine from kidneys to bladder- ureter
functional unit of kidney -nephron
temporary storage place for urine -urinary bladder
exit way of urine from body- urethra
filter of waste material from blood- kidney
Explanation:
hope it will help you