Heredity is the property of organisms to transmit the signs of their structure, functioning and development to descendants, from generation to generation. Variability is the ability of living systems to acquire new signs and properties. These two properties of living things are closely interconnected and play a huge role in the development of life on Earth. Changes in the genetic material lead to the appearance of new traits in organisms, their combinations determine the degree of fitness of an individual in specific conditions. Therefore, variability is a supplier of a variety of material for the selection of the most viable individuals, which will then pass on the signs of their structure and development by inheritance. This leads to the emergence of new species of organisms.
Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.