Si optas por descargar el libro de Biología de 2º Bachillerato de Anaya en PDF de manera gratuita, asegúrate de:
Biología 2. Bachillerato. Anaya + Digital. (Anaya) - eScholarium
Although less likely for specific textbooks, some educational resources are available for free under open licenses.
Mendelian genetics, molecular inheritance, and evolution.
The "Biología 2 Bachillerato" textbook by Anaya typically covers a wide range of topics in biology, tailored to the Spanish high school curriculum. Some of the key areas of study might include: