The lac operon contains an operator, promoter, and structural genes that are transcribed together and are under the control of the catabolite activator protein (CAP) or repressor.The lac operon encodes for the genes needed to utilize lactose as an energy source. Answer is C
        
             
        
        
        
I would guess it just means that the population just stays the same, no growth.
        
                    
             
        
        
        
(30%) gorilla babies die within the first few months of their lives because of inherent weakness of the infant or disease.
What is inherited disease?
Genetic factors play a role in almost all health conditions and traits, but there are some conditions in which genetic alterations play a role in almost all of the causes that cause the condition. 
Genes are passed from parent to child, so are DNA changes within the gene. DNA changes can also occur spontaneously, first appearing in children of unaffected parents. This is called a new mutation, and the word mutation means change.
Therefore, (30%) gorilla babies die within the first few months of their lives because of inherent weakness of the infant or disease.
To know more about  inherited disease, visit:
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Proton is positive.(+)
Neutron is neutral(0)
Electron is negative(-)