A variety (from the Latin. Sortis – variety) is a group of agricultural plants of the same species created as a result of breeding (for example, an apple tree) that possess inherited economically valuable traits.
Breed – a group of farm animals of the same species created as a result of breeding (for example, domestic sheep), possessing inherited economically valuable traits. Strain (from it, stamm – basis, tribe) – a pure culture of microorganisms isolated from a specific source or obtained as a result of mutations . No, because they still have similarities with the organisms of their species, only improved.
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.