Answer:
<h3>The correct answers are :</h3>
<u>(B) They have nuclei </u>
<u>(C) They live in moist environments.</u>
Explanation:
Protists are very diverse group of organism, it contains all the organisms that does not fits into other kingdom. All of the protists are not heterotrophs some of them are autotrophs. They reproduce sexually but some of them reproduce asexually. Example: amoeba: binary fission. Some of the protists are multicellular. Some of them are unicellular too.
 
        
                    
             
        
        
        
A marine layer is an air mass which develops over the surface of a large body of water such as the ocean or large lake in the presence of a temperature inversion. ... As it cools, the surface air becomes denser than the warmer air above it, and thus becomes trapped below it.
        
             
        
        
        
Answer:
Because of the angle of the Earth relative to the sun. The higher the sun is in the sky, the higher the UV radiation level.
Explanation:
So, the lattitudes toward the poles that receive sunlight are at an oblique angle, with that being said, the amount of radiation is spread to a larger area than the equator. 
 
        
             
        
        
        
Answer:
Dam
Explanation:
A dam is built to control water through placement of a blockage of earth, rock and/or concrete across a stream or river