Question

Which of the following is a characteristic of unicellular organisms?

They can possess tissues and organs
All of their functions are performed by a single cell.
They are usually microscopic.
Each of their cells is specialized to perform a specific function

Answer 1

Unicellular organisms perform all life functions within a single cell, lacking differentiated tissues and organs found in multicellular organisms.

Step-by-step explanation:

The characteristic of unicellular organisms that distinguishes them from multicellular organisms is that all of their functions are performed by a single cell. Unlike multicellular organisms, which are organized into tissues, organs, and organ systems with specialized cells that perform specific functions, unicellular organisms must carry out every process necessary for life within that single cell. Although unicellular organisms can be complex and have highly organized internal structures, they do not have true differentiated tissues and organs like multicellular organisms do.

Answer 2

All of their functions are performed by a single cell.

Step-by-step explanation:

Unicellular are those organisms whose body is madeup of one cell. In Unicellular organisms one cell perform all the functions and activities of the cell such as respiration, digestion, excretion and reproduction. Unicellular organisms reproduce asexually such as binary fission, budding and fragmentation etc. In Unicellular organisms, a single cell is divided into two equal parts and each part becomes a new organism.