SALAZAR-ESTUPIÑÁN, Sianella Anais. Students’ Perceptions of Difficulties in Learning Mendel’s Laws in Biology in the Second Year of Unified General Baccalaureate. EKSIGMA, [S. l.], v. 2, n. 3, p. 21–31, 2026. Disponível em: https://eksigma.com/index.php/principal/article/view/32. Acesso em: 26 oct. 2026.