There is no living thing on Earth that doesn’t need water to live. All animals, plants, protists, fungi and bacteria must have water in some form in…

The non-living things are water, salt, gases, rocks, shells, and sometimes oil and trash. We all need to do our part to keep the ocean clean so the marine life is not harmed.

In terms of numbers of species, insects certainly represent the largest percentage of the world’s organisms. There are more than 1 million species of insects that have been documented and studied by scientists.

The kangaroo rat never has to drink water—it just gets it from the seeds it eats. To survive in the dry climes of the American West, its kidneys generate super-concentrated urine, and it doesn’t pant or sweat. Some species can even lower their metabolic rates so they lose less moisture through breathing.

Breathing is essential for animals to stay alive. In a study published Monday in the Proceedings of the National Academy of Sciences , researchers have now identified the first animal that doesn’t use oxygen to breathe: Henneguya salminicola, an 8-millimeter white parasite that infects the flesh of Chinook salmon.

anaerobe

The larger and more complex an organism, the more energy it needs to maintain its processes. There are no entirely anaerobic vertebrates for this reason. Even if we could somehow supply enough energy, without oxygen we wouldn’t have evolved lungs and probably not a voice either, so we wouldn’t look much like we do now.

Bacteria that require oxygen to grow are called obligate aerobic bacteria. In most cases, these bacteria require oxygen to grow because their methods of energy production and respiration depend on the transfer of electrons to oxygen, which is the final electron acceptor in the electron transport reaction.

We get oxygen by breathing in fresh air, and we remove carbon dioxide from the body by breathing out stale air. But how does the breathing mechanism work? Air flows in via our mouth or nose. The air then follows the windpipe, which splits first into two bronchi: one for each lung.

Like all living things, bacteria need food, water and the proper environment to live and grow. By controlling nutrients, water, temperature and time, air, acidity, and salt, you can eliminate, control, or reduce the rate at which bacteria grow.

Oxygen plays a critical role in respiration, the energy-producing chemistry that drives the metabolisms of most living things. We humans, along with many other creatures, need oxygen in the air we breathe to stay alive. Oxygen is generated during photosynthesis by plants and many types of microbes.