The egg shell would be most representative of the Earth's Mantle or "Crust", the yolk and white would represent the molten metal inside the earths core I assume.
 
        
                    
             
        
        
        
cAMP in the cytoplasm
Many cAMP can be generated as a second messenger to amplify the signal in response to hormone binding.
 
        
                    
             
        
        
        
Decomposers don't obtain energy, they release it into the environment.
hope this helps.
        
             
        
        
        
<span>The correct answer is d: detached earlobes</span>
The phenotype is the result of genotype and its interaction with the environment. The phenotype is an observable characteristic of an organism's trait, such as its morphology. So, in this case, morphological characteristic of the earlobe is that it is detached.