Question

plz. tell these questions

Answer 1

answer 1 presence of cell wall in onion cell and presence of large vacoule and of plastid which is absent in human cheek cell
answer 2 for instance the size of nerve cell is greater than tahat of sperm which is the smallest cell
answer 3 many single cell are living independently such as unicellular organisms amoeba etc

Answer 2

      yes, a single cell live independently because single cell or unicellualar  

      organisms such as amoeba,paramecium carry out digestion,

      respiration,excreation,reproduction on their own without any help.