Answer:
The correct answer is the first statement. 
Explanation:
A fundamental stimulus-response coupling mechanism that helps various species to react and sense different modifications taking place in various distinct environmental circumstances is known as a two-component regulatory system. Though this system is found in almost all the domains of life, however, it is generally witnessed in species like bacteria, mainly in the Gram-negative and cyanobacteria.  
In case, if the response regulator turns completely phosphorylated because of the absence of phosphatase activity, the cell would become insensitive towards the environmental stimulus. This generally happens as the cell will lose its tendency to sustain the response cycle because of the imbalance in the dephosphorylation and phosphorylation system that helps in sustaining the response of the cell towards a specific environmental stimulus.  
 
        
             
        
        
        
Answer:
The side groups are what make each amino acid different from the others. Of the 20 side groups used to make proteins, there are two main groups: polar and non-polar. These names refer to the way the side groups, sometimes called "R" groups, interact with the environment.
Explanation:
 
        
             
        
        
        
<span>The answer would be: Opioid drug withdrawal
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Since opioid is depressant, the withdrawal symptoms would be the opposite of it. Hyperactivity and increased reflex is a symptom of a stimulant agent or depressant withdrawal.
Syphilis would give fever and discharge. Fetal alcohol syndrome manifest as growth retar dation like smaller head, length, or weight. Palsy wouldn't cause hyperactivity. 
        
             
        
        
        
Its true a im shure i hope help you lol have a good day
        
                    
             
        
        
        
Answer:
Viruses are too small and simple to collect or use their own energy – they just steal it from the cells they infect. Viruses only need energy when they make copies of themselves, and they don't need any energy at all when they are outside of a cell.
Explanation:
PLEASE MARK AS BRAIN LIST