All animals and plants, and many fungi, bacteria, and protists all need pure oxygen (O2) to survive.
However, every single living thing in the world needs oxygen, in the form of oxygen containing compounds (most importantly is water, a compound that contains oxygen).
The way that organisms get oxygen greatly varies, however. Most, such as bacteria, plants, fungi, and even some animals, simply absorb oxygen through their surfaces. Others, such as fish, get oxygen from the water via gills, and most land animals (reptiles, birds, and mammals), get oxygen via their lungs by breathing air.
1. Individual: Individual is any living being. Individuals act reciprocally with the environmental abiotic factors, which limit their distribution.
2. Population: A group of individuals of a given species that live in a specific geographic area.
3. Community: All the living beings distributed into a specific geographical area. A community includes organisms of different species.
4. Ecosystem: The term refers to all the abiotic factors (physical and chemical constituents) and all the communities that established in a specific area.
5. Biosphere: It is the whole portion of Earth colonized by living beings. Biosphere is the sum of all the ecosystems established on Earth.
All animals must have oxygen to survive. In a plant's case, though, it needs carbon dioxide.
well mammals all breath air
An aerobic organism.
Aerobe
Aerobic
Yes :D
human
Facultative anaerobes can survive without oxygen but will use oxygen if it is present.
Oxygen. But an organism will not survive long on just oxygen.
dependancy
A change in an organism that takes place over time is called an adaptation. An adaptation happens when an organism needs to change in order to survive.
Organisms survive in an ecosystem by being in a food chain or adapting to the resident food web. For an organism to survive in an ecosystem in needs to find a way to belong. Sometimes when an new organism is introduced to an ecosystem they adapt too well and they are classified as an invasive species. The organism will either have to adapt to the ecosystem or die out.
Facultative anaerobes can survive without oxygen but will use oxygen if it is present.
the six things that an organism needs are: cellular organization,
An enzyme that needs oxygen to survive
YES! Every living organism needs Oxygen to survive... However, not to confuse you, there are scientific studies showing that a new multicellular life has been found that DOES NOTrequire oxygen.
cells
Aerobe
The oxygen in the H2O
They are know as parasites
Every living creature needs oxygen to survive. Just as every living creature needs water to survive. For example, such as spiders. Yup, spiders do to need oxygen AND water to survive, and of course food. So the answer to your question would be yes, snails do need oxygen to survive.
what do organismsin an ecosystem depend on the survive
Aerobic bacteria uses oxygen for cellular respiration and anaerobic bacteria doesn't require oxygen to survive. ˇ_ˇ 
food water space or shelter oxygen