Question

What differences are there between a free living, single celled organism such as a paramecium and a single human cell such as a ciliated cell of the respiratory tract?

Answer 1

The main difference between a free living, single celled organism such as paramecium and single human cell such as a ciliated cell of respiratory epithelium is that single celled organism (paramecium) exhibits motility whereas the single human cells are non-motile.

For a single cell organism motility is required for obtaining nutrition needed for metabolism, survival and generation of energy. But human cell the nutrition and other essential requirements such as oxygen is provided by the blood.

A free living single celled organism	A single human cell
Within the single cell all the life processes are carried out.	They are usually specialized to carry out Specific functions alongwith their normal cellular processes.
It is a complete organism.	It is a part of multicellular organism. They group together to form tissues which group to form organs then organ systems and at last the whole organism.
Reproduction mainly by asexual methods such as budding.	Somatic cells donot take part in the reproduction only the gametes take part in reproduction. Since ciliated cells is a somatic cell it has no role in reproduction.
Motility is seen.	It is not motile.
For example :- Paramecium which performs all the life process within the cell. These processes includes- Motility nutrition, metabolism, excretion, reproduction etc.	For example :- Ciliated cells of respiratory epithelium whose main function is to propel mucus alongwith debris and foreign, particulate matter out of the respiratory tract.