I believe it's either genus or species.
        
             
        
        
        
Answer:
binding of the hormone molecule with its receptor of the cell.
Explanation:
Hormones are chemical messengers secreted or released by endocrine glands to effect a response in another location called target location. Hormones are proteinous molecules and like every other protein, its function is determined by its shape. 
Hormones function or effect their changes by binding to the receptor of the target cell. The hormone recognizes and will only bind to its own receptor molecule on its target cell on order to bring about any change. This defines the specificity of the hormone.
 
        
             
        
        
        
Answer: the botanist Matthias Schleiden and the zoologist Theodore Schwann stated
Explanation: This Cell Theory has been influential in shaping the biological sciences ever since, in 1838/1839, the botanist Matthias Schleiden and the zoologist Theodore Schwann stated the principle that cells represent the elements from which all plant and animal tissues are constructed.
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HOPE THIS HELP!!</h2>
 
        
             
        
        
        
The practice of forming step-like fields on steep slope is called : Terracing 
Terracing was created to enhance the farming activities in the area that would increased the farming activity as whole, such as irrigation system, soil structure, etc
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Hope this helps!
        
                    
             
        
        
        
1. E: Photosynthesis; D: cellular respiration 
2. all Eukaryotic cells 
3. cellular respiration does not consume carbon dioxide
4. the 200 calorie food contains less potential energy than the 300 calorie food