Yes and no, depending on the organism.
The term of having an ecosystem in a jar is defined as terrarium. A terrarium is a closed environment for keeping and raising plant species for research.
That depends on whether or not the plant wants it to be open or closed.
closed. Open circulatory systems are common in athropods, such as scorpions and insects, but not of mammals. They are when the body lacks blood vessels but has blood throughout the entire cavity of the body. Mammals have closed circulatory systems, as they contain blood vessels.
squids have closed closed circulatory systems
An ecosystem which is neither open nor closed is known as an "Ideal Ecosystem".
"Show" is open, "and" is closed. O- is open, -pen is closed. "Closed" is closed.
Open grassland ecosystem.
One open, one closed.
open
a construction site?
The opposite of the adjective closed is open. The opposite of the verb closed is opened.
human is a closed syllable word
Both open syllables.
Closed. If it is open then the power is off.
A biodome is a closed ecosystem housed in a domelike structure.
One open, one closed