| Source | Description | Language | |--------|-------------|----------| | | Free peer-reviewed biology textbook (downloadable PDF). Official Spanish version: Biología by OpenStax. | ES / EN | | Khan Academy | Not a single PDF, but printable guides + practice. Spanish modules available. | ES | | LibreTexts Biology | Modular, wiki-style textbook with PDF export option. Spanish translations partial. | ES / EN | | CONICET / university repos | Many Latin American universities (UBA, UNAM, UNAL) offer free course PDFs. Search: “Biología General PDF [university name] sitio oficial” | ES | | Google Scholar | Filter by “PDF” – often finds lecture notes or public-domain texts. | ES / EN | | Internet Archive | Older public-domain textbooks (e.g., 1920s–1960s) – useful for history but not modern molecular bio. | EN / ES |
2. Contenidos Fundamentales en un Curso de Biología General
| Source | Description | Language | |--------|-------------|----------| | | Free peer-reviewed biology textbook (downloadable PDF). Official Spanish version: Biología by OpenStax. | ES / EN | | Khan Academy | Not a single PDF, but printable guides + practice. Spanish modules available. | ES | | LibreTexts Biology | Modular, wiki-style textbook with PDF export option. Spanish translations partial. | ES / EN | | CONICET / university repos | Many Latin American universities (UBA, UNAM, UNAL) offer free course PDFs. Search: “Biología General PDF [university name] sitio oficial” | ES | | Google Scholar | Filter by “PDF” – often finds lecture notes or public-domain texts. | ES / EN | | Internet Archive | Older public-domain textbooks (e.g., 1920s–1960s) – useful for history but not modern molecular bio. | EN / ES |
2. Contenidos Fundamentales en un Curso de Biología General biologia general pdf