Why are there rare and endangered species, if any organism is capable of an unlimited growth in numbers?

1) There are factors – limiters that do not allow to restore their numbers.
2) Human economic activity threatens the existence of many species.
3) Change in habitat.

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.