They both have an egg cell wall, a vacuole, and chloroplast, smooth and rough  ER, and much more.
Onion skin is treated to be a tissue because it is thin and - brittle.
The skin cells of the onion get a well which gives- the outer portion its rigid shape.
        
             
        
        
        
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.'
 
        
                    
             
        
        
        
Cell membranes are not solid structures. 
        
             
        
        
        
Answer: the pioneer species
Explanation: