Heterotrophication means that inorganic substances cannot directly synthesize organic substances, and ready-made organic substances must be ingested to maintain a nutritious lifestyle. Heterotrophic relative autotrophic; Plants are basically autotrophic and animals are basically heterotrophic. Heterotrophication includes growth, parasitism and saprophy.

Heterotrophic ways are:

1, * * * was born.

Mutual benefit means that two creatures live together, which is beneficial to each other. After separation, they cannot live independently. Lichens, for example, are living organisms of fungi and algae. Lichens absorb nutrients through fungal mycelium and produce organic matter through the photosynthesis of algae plants.

2, parasitism.

Parasitism means that two organisms live together, one benefits and the other suffers, and the latter provides nutrients and living places for the former. This biological relationship is called parasitism.

3. saprophytic.

Saprophage is a way for organisms to obtain nutrition. Any organism that obtains nutrients from animal and plant carcasses or decaying tissues to maintain its own life is called saprophyte. Most molds, bacteria, yeast and some higher plants are saprophytes. Aerobic decomposition of saprophytic bacteria in soil is a necessary link of material circulation.

Mutual benefit means that two creatures live together, which is beneficial to each other. After separation, they cannot live independently. Lichens, for example, are living organisms of fungi and algae. Lichens absorb nutrients through fungal mycelium and produce organic matter through the photosynthesis of algae plants. Fungi and algae in lichens cannot live independently if they are separated.