Answer:
a. scientific journal articles and presentations at conferences 
Explanation:
right answer on edg.
 
        
                    
             
        
        
        
The water would freeze across the surface of the lake, blocking the dissolving of oxygen and nutrients. <span>Water is actually less dense when frozen, which is why ice cubes and ice bergs all float. This is also why you can ice skate on a lake if the ice gets thick enough on the surface. Many organisms that live in freezing lakes have special adaptations which help them survive.</span>
        
                    
             
        
        
        
Answer:
Prokaryotic DNA can be found in the cytoplasm whereas eukaryotic DNA is found in the nucleus, enclosed by the nuclear membrane. 
Explanation: