What is chemosynthetic and holozoic?explain
Chemosynthesis is the use of energy released by inorganic chemical reactions to produce food. Chemosynthesis is at the heart of deep-sea communities, sustaining life in absolute darkness, where sunlight does not penetrate. All chemosynthetic organisms use the energy released by chemical reactions to make a sugar, but different species use different pathways. For example, the most extensive ecosystem based on chemosynthesis lives around undersea hot springs. At these hydrothermal vents, vent bacteria oxidize hydrogen sulphide, add carbon dioxide and oxygen, and produce sugar, sulphur, and water: CO2 + 4H2S + O2 -> CH20 + 4S + 3H2O. Other bacteria make organic matter by reducing sulphide or oxidizing methane. Chemosynthetic bacterial communities have been found in hot springs on land and on the seafloor around hydrothermal vents, cold seeps, whale carcasses, and sunken ships.
Holozoic nutrition takes place in those organisms which take solid or liquid food through the mouth inside their body. Examples of organisms having a holozoic mode of nutrition are human beings, dog, cat, lion, deer, crow, frog and fish etc. This process takes place in following steps:
1. Ingestion
The process of taking food inside the body is called ingestion.
2. Digestion
In digestion, the ingested food is converted into simple form with the help of digestive enzymes.
3. Absorption
In this stage, the food digested in the second step is absorbed into the cells of the body.
4. Assimilation
Assimilation is the process of utilizing the food absorbed in the third step by various cells of the body.
5. Egestion
Egestion is the final step of holozoic nutrition in which the undigested food is removed from the body.
Chemosynthesis is the use of energy released by inorganic chemical reactions to produce food. Chemosynthesis is at the heart of deep-sea communities, sustaining life in absolute darkness, where sunlight does not penetrate. All chemosynthetic organisms use the energy released by chemical reactions to make a sugar, but different species use different pathways. For example, the most extensive ecosystem based on chemosynthesis lives around undersea hot springs. At these hydrothermal vents, vent bacteria oxidize hydrogen sulphide, add carbon dioxide and oxygen, and produce sugar, sulphur, and water: CO2 + 4H2S + O2 -> CH20 + 4S + 3H2O. Other bacteria make organic matter by reducing sulphide or oxidizing methane. Chemosynthetic bacterial communities have been found in hot springs on land and on the seafloor around hydrothermal vents, cold seeps, whale carcasses, and sunken ships.
Holozoic nutrition takes place in those organisms which take solid or liquid food through the mouth inside their body. Examples of organisms having a holozoic mode of nutrition are human beings, dog, cat, lion, deer, crow, frog and fish etc. This process takes place in following steps:
1. Ingestion
The process of taking food inside the body is called ingestion.
2. Digestion
In digestion, the ingested food is converted into simple form with the help of digestive enzymes.
3. Absorption
In this stage, the food digested in the second step is absorbed into the cells of the body.
4. Assimilation
Assimilation is the process of utilizing the food absorbed in the third step by various cells of the body.
5. Egestion
Egestion is the final step of holozoic nutrition in which the undigested food is removed from the body.
