Made mostly of collagen, bone is living, growing tissue. Collagen is a protein that provides a soft framework, and calcium phosphate is a mineral that adds strength and hardens the framework. This combination of collagen and calcium makes bone strong and flexible enough to withstand stress.
Psychrotrophic bacteria are defined as those that grow at 7Â°C, although their optimal growth temperature is higher. During cold storage after milk collection they dominate the flora, and their extracellular enzymes, mainly proteases and lipases, contribute to the spoilage of dairy products.
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.