Answer:
DNA makes up many genes that are simply turned off and on. It's like ho2 the 1 in binary represented a "on", and the 0 would represent "off".
I hope this helped!
 
        
             
        
        
        
C. by observing them in their habitats
Ex: The Galapagos Islands. Darwin went their to study the flora and fauna in their natural habitat.
 
        
             
        
        
        
This process is called autophagy.
Autophagy is an intracellular process of degradation, which includes the destruction of cytoplasmic components in the lysosomes. These components are considered unnecessary or dysfunctional and that is why they are recycled by the cell. 
Autophagy has four sequential steps which are the sequestration, the transport of the components to the lysosome, the degradation, and the recycling and utilization of the degradation products.
Autophagy is considered as an adaptive response to stress by ensuring the survival of the cell and the tissue. 
        
                    
             
        
        
        
I think the first one is right !.... but the for the other one it's B .