The two main tissues responsible for structural support are BONES AND CARTILAGES. Bone which is made up of collagen and calcium phosphate provides support and protection for body organs. Cartilage which is made up of closely packed collagenous fibers provides flexible support for some structures such as ear, nose and trachea. 
        
             
        
        
        
My response to your question is inexplicably being blocked from posting, so I've attached it as a PDF file. Please let me know if you can't access it or if you have any other follow-up questions/comments. Hope this helps!
 
        
             
        
        
        
Transpiration ...............
        
                    
             
        
        
        
Carotenoid pigment is a pigment ranging in color from yellow to red; helpful in capturing the Sun's light energy for use in photosynthesis
        
             
        
        
        
A gene is a segment of DNA which encodes for  the production of proteins(building blocks of life) which provides structure to our bodies. These proteins carry out bodily functions and determine the physical characteristics of an organism.<span>
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Therefore the answer should be genes.