why would some biologists refer to single-celled organism Amoeba and Paramecium as acelular rather unicelular?

Answer 1

"Acellular" is often used to indicate "not divided into individual cells by cell membranes". The term is used because some organisms contain all the components of multiple cells, including multiple nuclei, but simply lack the internal membranes to physically divide them into cells. The large fresh water ameba Pelomyxa is one such organism. So the question arises, can one cell have fifty nuclei? If not, then Pelomyxa is not one cell. But neither is it multicellular. So the default term for such organisms is "acellular". However, the meaning here is quite different from what we mean when we say that a virus is "acellular".

Answer 2

AMOEBA ONCE IT STARTS DEVELOPING IT DOESE NOT CHANGE FROMY THE ORIGN MOEBA IT JUST CONTINUES DIVISION BUT REMAINS THE SAME THING WHILE A PARAMECIUM FROM ONE STAGE TO ONOTHER BUT REMAIN IN ITS CELL FORM

Answer 3

so amazed that I found this question already answered! It is like you've read my mind!

Answer 4

Not sure