The part of cellular respiration in which glucose is broken down is called

Glycolysis

Explanation:

In cellular respiration Glycolysis is an anaerobic process in which one molecule of glucose is broken down into two molecules of pyruvate and two net ATP and 2 NADH are produced.

For complete oxidation of glucose in an aerobic condition pyruvate is converted to a two carbon acetyl CoA which enters the TCA or Krebs Cycle.

In the TCA cycle during cellular respiration acetyl CoA is completely oxidized to a carbon molecule CO2, and produces energy rich molecules that are used in the electron transport chain.

the unequal cytoplasmic division that  results  in  one egg  and three polar bodies ensures that a fertilized  egg has  ample nutrients  forits journey  to  the uterus.

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