I would say within the space C
(A) cells are the transitional epithelium cells, there resist to the acidity of the urine. It protects smooth muscle cells (B) responsible for the bladder contraction and the release of the urine by the urethra.
the C space represents the intern cavity of the bladder where the urine is supposed to be stored waiting for the micturition (urination).
Genetic Engineering. They are changing the genes of something (In this case, Cabbage) to help is survive its environment better.
B wind has nothing to do with the sun
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