Cognitive development is Jean Piaget's theory. Through a series of stages, Piaget proposed four stages of cognitive development: the sensorimotor, preoperational, concrete operational and formal operational period.
The versatility of Bifidobacterium longum as a lactic acid microorganism is reflected in its capacity to resist under harsh conditions such as stomach acid, bile, pH fluctuations, and gastrointestinal passage.
Bacillus megaterium is a gram positive, spore producing bacteria. It is a Eubacteria and is found in the soil. It has a rod shape and is one of the largest Eubacteria.Colonies form in chains due to sticky polysaccharides on the cell wall. It is very important in the biotech industry due to its size and its' enzyme and cloning abilities.t also is very efficient in cloning due to no protease degradation of product and good stability of recombinant plasmids. Bacillus megaterium-mega (Greek, Large) -teratis (Greek, monster, beast) -megaterium (big beast) Eubacteria.