Ans. 
Testes and ovaries are male and female reproductive organs, respectively. These organs are similiar as testes produce male gametes or sperms by the process of spermatogenesis and ovaries produce female gametes or ova by the process of oogenesis. 
These gametes fuse together to form zygote that develops into a multicellular organism. Thus, the correct answer is 'option A). both produce sex cells.'
 
        
                    
             
        
        
        
It is true that the potential must be strong enough to send
a potential to the CNS. The stronger the potential, the more it will excite the
transmitter in relaying the message to another neuron, therefore, if this
happens, the more will it be easier to pass the message.
 
        
                    
             
        
        
        
Answer: l is tibia
k is fibula
r is scapula 
i is phalanges
q is humerus
i believe this is right hope it helps!