Thyroxine is an important hormone released into the bloodstream by the thyroid gland in the body. When tyroxine is released into the blood stream, it moves through certain organs such as the kidney and liver, where most of it is changed to an active form known as triiodothyronine. Thyroxine perform important roles in brain development, heart and digestive functions, bone maintenance, controlling muscle and metabolic rate of the body.
I think the answer is B
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c.the cytoplasm will divide
If the magnification of the microscope increases, then the visibility of the cell organelles would be clearer.
OR
If cells are viewed under higher magnification, then more cell organelles will be seen.