Because when you put a part of the DNA and take it out, you can restrict an ability of that cell. When you cut out a piece of DNA from a pancreas beta cell that codes for insulin synthesis, you restrict the cells ability to make insulin, hence the name "restriction enzyme". I hope this is the answer that you are looking for and it comes to your help.
        
             
        
        
        
A biomass pyramid shows the total mass of the organisms that each trophic level occupies in an ecosystem. Usually, producers have a higher biomass than any other trophic level, but there can be lower amounts of biomass at the bottom of the pyramid if the rate of primary production per unit biomass is very fast.
 
        
                    
             
        
        
        
<span><span>Chaetognaths worms </span>are the transparent worms that prey on the other plankton.
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Answer:
A The gravity of the moon pulls the ocean, which causes the tides.
Explanation:
Well all of the other answers are just completely different. 
if the moon is invisible tides cannot be seen, but why is it at night it is called high tide. B is very odd because many surfing events happen during the day.
It is A because it contains the most context, because it is the only reliable and realistic option, because when the moon is up, and the sun is down, it causes stronger waves
 
        
             
        
        
        
Answer:
C
Explanation:
Humans are the most evolved species in the phylogeny
 Phylogeny in biology pertains to the evolutionary history or development of a group of organisms, such as a tribe or a racial group.
Human happen to be at the top of this evolutionary history