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.
Agrobacterium tumefaciens is closely related to a bacterium that has a positive, symbiotic relationship with plants, Sinorhizobium meliloti. This bacterium lives on alfalfa and other legumes and helps its plant host acquire nitrogen.