They both have an egg cell wall, a vacuole, and chloroplast, smooth and rough ER, and much more.
Onion skin is treated to be a tissue because it is thin and - brittle.
The skin cells of the onion get a well which gives- the outer portion its rigid shape.
Cell -> tissue -> organ -> organ system -> organism
The asters function in cell division is to separate the sister chromatid away from each other to process the Telophase
I guess the three parts of the large intestine is it absorbs remaining water, bacteria eats rest of what ever could be digested then puches to anus
