Description: Unicellular organisms. Prokaryotic (without nucleus) and without organelles.
Extremities: Some have flagellum to move and pili (hairs) to attach themselves to a surface.
Nutrition: Heterotrophic (they eat organic substances, acting as decomposers) or Autotrophic (some performs photosynthesis, and others chemosynthesis, this is they obtain energy from chemical reactions)
Respiration: Some need oxygen to live (aerobic) but others don't (anaerobic)
Reproduction: Asexual, through division.
Classification: Bacteria, the oldest living things on Earth.
Including the Cyanobacteria, the primary
producers of oxygen and nitrogen for the
atmosphere and the oceans for over 3.000
million years.
Archea
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| Cyanobacteria |
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| Añadir leyenda |
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| Archeabacteria |
 |
| Cyanobacteria |
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