It will be Control. Part of the experiment used to show that the results of an experiment is really due to the conditions being tested.
The spindle fibers produced by the centrioles are necessary for the division of the chromosome at the time of the anaphase. In case, the centrioles do not perform their task, the genetic material in the cells may not divide equally due to the lack in the separation of the chromosomes. Hence, the problem with the centrioles may lead to the unequal division of the genetic material during the cell division process.
Hence, the correct answer is centrioles.
A diet high in protein and low in calcium may lead to osteoporosis. This is because protein, especially albumin, binds free calcium in the blood preventing it to be act upon calcitonin and preventing it to deposit in the bones. Low calcium predisposes patients in osteoporosis as there will be no calcium to be deposited in the bones.
Combines photosynthesis and heterotrophic nutrition