What aromorphoses make mammals different from their ancestors?

1) The appearance of the auricle
2) Hair
3) Developed brain, the appearance of the cerebral cortex
4) Intrauterine development
5) The presence of the placenta and mammary glands
6) feeding babies with milk
7) more complex adaptive behavior



One of the components of a person's success in our time is receiving modern high-quality education, mastering the knowledge, skills and abilities necessary for life in society. A person today needs to study almost all his life, mastering everything new and new, acquiring the necessary professional qualities.