There are several different types of organisms, including: producers, scavengers, parasites, consumers, predators, carnivores, omnivores, herbivores and decomposers.

In an ecosystem, there are three kinds of organisms: producers, consumers, and decomposers.

Yes absolutely a unicellular organisms can live by themselves. Despite they are only single celled they got food vacuoles, digestive vacuoles and every possible function a cell can. They divide too in order to produce offspring.

• Producers. . Producers make their own food using the sun.
• Scavengers. .
• Parasites. .
• Consumers. .
• Predators. .
• Carnivores. .
• Omnivores. .
• Herbivores. .

A virus is a small parasite that cannot reproduce by itself. Once it infects a susceptible cell, however, a virus can direct the cell machinery to produce more viruses. Most viruses have either RNA or DNA as their genetic material. The nucleic acid may be single- or double-stranded.

Are viruses alive or dead? Most biologists say no. Viruses are not made out of cells, they can’t keep themselves in a stable state, they don’t grow, and they can’t make their own energy. Even though they definitely replicate and adapt to their environment, viruses are more like androids than real living organisms.

The main purpose of a virus is to deliver its genome into the host cell to allow its expression (transcription and translation) by the host cell. A fully assembled infectious virus is called a virion.

Antibiotics do not work on viruses, such as those that cause colds, flu, bronchitis, or runny noses, even if the mucus is thick, yellow, or green. Antibiotics are only needed for treating certain infections caused by bacteria, but even some bacterial infections get better without antibiotics.