At present, Earth is the only such planet known.
lifethat it is the only planet in the solar system that supports living things and organisms
It is one of a few that are able to support living organisms.
No only living organisms have cells. But non-living organisms are made up of atoms instead.
So far as we know, only Earth has living organisms. There is strong evidence (some from the Cassini probe) for liquid oceans in moons of Saturn and Jupiter, such as Enceladus, Titan, and Europa; and speculation that these may host life.
Earth is the only known planet to support life, with an abundance of diverse organisms ranging from microscopic bacteria to complex mammals. There is no definitive evidence of life on any other planet in our solar system or beyond.
One view The Earth can be classified as a habitable planet (and it is the only one we presently know of). Another view A rocky planet characterised by the presence of liquid water and a chemically far-from-equilibrium atmosphere generated by the living organisms that populate its surface.
Life. One reason for this is the fact that it has water and a breathable atmosphere.
unicellular organisms
All life (living organisms) on the planet Earth contain DNA. It is in fact one of the defining characteristics of life.
earth is the only living planet and one of the terrestrial planets
Yes , bacteria , protozoa and many algae contain only one cell .
The only commonality between ecosystems is that they are made up of organisms that interact with one another and non-living materials.