Think it’s answer D but it maybe B 
hope this helps!!
sorry if it’s wrong
        
             
        
        
        
Hi , cytoplasmic streaming is actually circulating around in the cell . It moves and by doing do it can help move organelles and harmful/helpful chemicals to where they need to be in the cell , so that's why cytoplasmic streaming is also called active mass movement of cytoplasm. 
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Answer:
C)	extra chromosome; nondisjunction
Explanation:
 
        
             
        
        
        
1,700 species of plants live on the arcitc like flowering plants , herbs , grasses,dwarf shrubs, mosses , lichens and the arctic willow ....