Upwelling  is a process in which cold water from depths arise to the surface,
it's important because :
- It bring a lot of nutrients to the surface of the ocean
- It maintain the temperature of the ocean
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A) Some members of the Euglenoids lose their photosynthetic pigment when left in Dark : TRUE 
B )The loss of photosynthetic pigment in Euglenids stored in the dark is permanent : False
<h3>What are Euglenas</h3>
Euglenas are unicellular organisms belonging to the kingdom Protista, when kept in the dark for too long Euglenoids begin to lose their chlorophyll. As it loses its chlorophyll it becomes unable to produce its own food and starts consuming bacterias within its habitat. 
 The loss of chlorophyll in Euglenids can be regained after it is been exposed to sunlight and allowed  to grow exponentially for several weeks.
Hence we can conclude that  Some members of the Euglenoids lose their photosynthetic pigment when left in Dark : TRUE  while The loss of photosynthetic pigment in Euglenids stored in the dark is permanent : False
Learn more about Euglenoids : brainly.com/question/1278307
  
        
             
        
        
        
B. cerebellum, the cerebellum is responsible for all these as well as maintaining muscle tone
        
             
        
        
        
Mitochondria and chloroplasts.
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Yes it is , <span>A hypothesis is a reasonable guess based on what you know or observe.</span>