Question

In which of the following organisms is the cell considered to be equivalent to the organism?

• A. <!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> Unicellular prokaryotes
• B. Unicellular eukaryotes
• C. Multicellular eukaryotes
• D. Both a and b

Answer 1

The correct option is D Both a and b

In unicellular organisms, the cell is considered to be equivalent to an organism. The single cell performs all functions of life.
Multicellular organisms usually have cells (cell aggregate- Porifera), tissues (Cnidaria, Ctenophora), organs (Platyhelminthes) and organ systems (Aschelminthes to Mammalia). There are different levels of organization in different organisms which perform various functions.