1. Classification of bacteria by type of respiration. Methods of cultivating bacteria on the type of respiration. growth n breeding of bacteria Breeding phase

Bacteria can be classified based on their type of respiration into two main groups: aerobic bacteria and anaerobic bacteria.<br /><br />Aerobic bacteria require oxygen for their growth and survival. They use oxygen as a terminal electron acceptor in the electron transport chain during cellular respiration. Examples of aerobic bacteria include Escherichia coli, Pseudomonas aeruginosa, and Bacillus subtilis.<br /><br />Anaerobic bacteria, on the other hand, do not require oxygen for their growth and can even be inhibited or killed by its presence. They use other electron acceptors such as nitrate, sulfate, or carbon dioxide in their metabolic processes. Examples of anaerobic bacteria include Clostridium botulinum, Methanogens, and Lactobacillus acidophilus.<br /><br />When it comes to cultivating bacteria based on their type of respiration, different methods are used. For aerobic bacteria, cultivation is typically done on solid media such as agar plates or slants, or in liquid media such as broth. The bacteria are grown at room temperature or at a specific temperature that is optimal for their growth. Oxygen is provided to the culture medium, usually through agitation or shaking.<br /><br />For anaerobic bacteria, cultivation is done in an anaerobic environment. This can be achieved by using anaerobic jars or bottles that contain a gas-generating pack to create an oxygen-free atmosphere. The bacteria are grown at a specific temperature that is optimal for their growth.<br /><br />The growth and breeding of bacteria involve several phases. The first phase is the lag phase, where the bacteria adapt to the new environment and prepare for growth. The second phase is the log phase or exponential phase, where the bacteria undergo rapid cell division and growth. The third phase is the stationary phase, where the growth rate slows down as the nutrients in the medium become limited. Finally, the fourth phase is the death phase, where the bacteria start to die off due to lack of nutrients or accumulation of toxic products.<br /><br />In summary, bacteria can be classified based on their type of respiration into aerobic and anaerobic groups. Different methods are used to cultivate them based on their type of respiration, and their growth and breeding involve several phases.