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What is the circled structure ?

What is the division name for this organism ?

What is the structure labeled a ?

  What is the structure at the end of the arrow  ?

One                                                                                  Two     Three Which of these are cocci ?

    Why did the solution turn from yellow to red when the plant was placed in the light?

What is the name of the structure at the end of the arrow ?

One   Two   Three   Which of these are spirilla ?  

What is the structure at the end of the arrow called ?

What is the function of structure at the end of the arrow ?