The cover of a GCSE Biology textbook with a green background and a close-up of plant cells. The title 'GCSE Biology' is prominently displayed in white letters, with 'Resources & Planning' written below it. The 'Twenty First Century Science' logo is visible in the top right corner. The textbook is part of the 'Oxford Bookworms' series, and the cover has a barcode and the publisher's logo in the bottom right corner.