G. Mendel very successfully chose an object for his experiments. It is easy to grow peas in the Czech Republic, it propagates several times a year, pea varieties differ from each other in a number of clearly distinguishable characters, and finally, pea is self-pollinating in nature, but in the experiment self-pollination is easy to prevent, and the researcher can pollinate the plant with pollen from another plant.
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.