cells require oxygen to burn sugar.
Because they do.
Glycolysis can occur without oxygen. Although glycolysis does not require oxygen, it does require NAD+. Cells without oxygen available need to regenerate NAD+ from NADH so that in the absence of oxygen, at least some ATP can be made by glycolysis.
All organisms are made of cells. An onion is and organism, hence all parts of an onion are made of cells.
No chloroplasts in cheek and onion cells
All the cells require oxygen, and so the way of them getting it is via the blood.
Between the 2 cells that are cheek and onion cells, the one that has a regular arrangement and structure are onion cells. Cheek cells have an irregular shape.
Onion cells do not have chloroplasts because the onion is underground where there is no light. Without light chloroplasts have no purpose, so onion cells just don't have them.
No. Chloroplasts are only found in plant cells. They basically carry out the process of photosynthesis to provide the glucose and oxygen necessary for plants' survival.
All cells have cytoplasm, so yes, onion cells have cytoplasm.
All cells have cytoplasm, so yes, onion cells do have cytoplasm.
A onion cell is : 0.2 mm