The answer is Endemic Species
Endemic species refer to those that can only be found in a particular geographic location such as a specific island, habitat, or other pre identified zones. To be categorized as an endemiz species, that species must only be found in 1 specific location and nowhere else in the world
One of the example of endemic species is Comodo Dragon that can only be found in Comodo Island, Indonesia
They may have ran out of oxygen, or they may not have been water dwelling snails, as not all are, lack of food, no flow of water into and out of the tank would cause them to run out of oxygen.
Primary consumer; they consume the plants first
Well, it starts at the very bottom
Cells
Tissues
Organs
Organ Systems
Organisms
The level below Organs is Tissues.
Thus, Tissues is the level just below organs in complexity.
