Libros de Estudios generales de biología, página 4 de 125

Written by a former senior examiner and endorsed by WJEC, this book includes everything you need for success in your study and exams. The only study and revision guide available in one book that precisely matches the WJEC AS Biology course you are studying - all you need to support you through your AS course and prepare you for the exams. The book contains essential underpinning knowledge to support course study as well as revision. Features to aid study support include: / Numerous diagrams to clearly explain each concept. / Examiner pointers focus on understanding and using the underpinning knowledge. / Key terms are clearly defined on each page. / Quickfire questions check and reinforce your understanding. / Features to aid revision support include: / Q&A section provides numerous exam-style questions with two levels of student answers and examiner commentaries and marks so you can see where mistakes are typically made and where marks can be gained. / Exam practice and technique section offers advice on how exam questions are set and marked and how to boost grades. / Grade boost tips help refine exam technique, improve grades and avoid common mistakes. / Unit summaries provide a visual prompt for remembering key knowledge.

No se puede entender la ecología ni la evolución de la vida sin considerar las interacciones bióticas del ambiente, esto es, las relaciones establecidas entre los organismos y los facto-res bióticos y abioticos de su ecosistema que les permiten adaptarse y sobrevivir. De hecho, la gran biodiversidad en el planeta puede considerarse como una consecuencia de este tipo de relaciones. En esta coleccion de textos se analizan los efectos positivos y negativos de las interacciones bioticas y como se ven reflejados en los procesos demograficos, ecologicos, y evolutivos de las especies, abarcando desde las interacciones mas conocidas -la herbivoria y la polinizacion- hasta las reflexiones mas recientes sobre la huella del ser humano impresa en los ecosistemas a nivel local, regional y global.