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What are the main differences between autotrophs and heterotrophs?
Autotrophic organisms are organisms that grow with carbon dioxide as the main carbon source and can survive in an organic-free environment, including plants and bacteria that can carry out photosynthesis and bacteria that can synthesize energy, and are producers in the ecosystem.

Heterotrophs can't live in an environment without organic matter, including predators, parasites and saprophytes. It is a consumer or decomposer in the ecosystem.

Brief introduction of heterotrophs

Heterotrophs and heterotrophs refer to those creatures who can only use the ready-made organics in the external environment as energy and carbon sources, ingest these organics into their bodies, convert them into their own components, and store energy. Such as: fungi living in saprophytic and parasitic life, most kinds of bacteria.

Classification of heterotrophs

Heterotrophic aerobic type

This kind of bacteria is the main member of the bacterial family, with the largest variety and quantity, such as Bacillus subtilis, common pathogenic bacteria and most other bacteria. From the aspect of assimilation, it can be divided into saprophytic and parasitic according to its habitat and the way of obtaining nutrients. There are intermediate types between saprophytic and parasitic, which can be saprophytic or parasitic. For example, there are two stages in the life cycle of B. Bacteriouorus: parasitism and saprophy.

From the perspective of alienation, this kind of bacteria is aerobic and must live in an aerobic environment. Molecular oxygen is the final electron acceptor in the process of productivity metabolism, and carries out aerobic respiration. Vibration, stirring or ventilation are needed to provide sufficient oxygen during culture.

aerobic bacteria

As the name implies. Facultative anaerobic, that is to say, aerobic is dominant, supplemented by anaerobic. In other words, aerobic growth is the main factor, and respiratory productivity depends on aerobic growth; It has both anaerobic growth ability and anaerobic fermentation or anaerobic respiration ability. Facultative aerobic, that is, anaerobic breathing, supplemented by aerobic, is the same.

Facultative aerobic microorganism

Two names of a bacterium facultative anaerobic bacteria are also called facultative aerobic bacteria. This microorganism has wide adaptability and can grow in aerobic or anaerobic environment. Generally, aerobic growth is dominant, and respiratory productivity depends on aerobic growth; It has both anaerobic growth ability and anaerobic fermentation or anaerobic respiration ability. For example, members of Enterobacteriaceae such as Escherichia coli and Enterobacter aerogenes, and LZ such as Bacillus licheniformis and Saccharomyces cerevisiae can refer to microbiology.

Also known as aerobic bacteria and aerobic microorganisms. Growth and reproduction in aerobic environment, oxidation of organic or inorganic substances, aerobic respiration with molecular oxygen as the final electron acceptor. Include most bacteria, actinomycetes and fungi.

The function of stable and effective aquarium biochemical filtration system is to remove NH4, NH3, NO3 and NO2 from water. The whole removal process is generally called nitrogen cycle.

Folded nitrifying bacteria