1) The research method is a way of scientific knowledge of reality.
2) There are biological research methods: description, observation, comparison, experiment, microscopy, centrifugation, hybridological, twin method, biochemical method, etc.
3) Research methods are applied only in certain cases and to achieve certain goals. For example, hybridological – for the study of heredity is used in animal husbandry and plant growing, but not for humans. Centrifugation allows you to select organelles of the cell for their study.
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.