Federal vs. Unitary Governments. In a unitary government the power is held by one central authority but in a federal government, the power is divided between national (federal) government and local (state) governments. In recent years there has been a strong global trend toward federal governments.
Different types of autotrophic nutrition. Autotrophic nutrition is very important! Autotrophic nutrition means that simple inorganic substances are taken in and used to synthesise organic molecules. Energy is needed to achieve this. In photo-autotrophic nutrition light is the energy source. In most instances the light source is solar energy, the process being photosynthesis. Carbon dioxide and water are taken in by organisms and used to synthesise glucose, which can be broken down later during respiration to release the energy needed for life.
Heterotrophic bacteria-Bacteria which are dependent on other organisms for their food are heterotrophic.(Example Escherichia coli). Autotrophic bacteria can be Chemosynthetic or Photosynthetic. Chemosynthetic bateria are those which prepare their food with the help of inorganic substrates.hotosynthetic bacteria are autotrophic bacteria which prep are their own food by the process of photosynthesis. Cyanobacteria (Blue-green algae) - They have chlorophyll similar to plants and hence they are photosynthetic autotrophs. The marine and terrestrial and they may be unicellular, colonial or filamentous.