Which of these is an adaptation of red blood cells to help them transport oxygen efficiently?
They can alter their shape to engulf pathogens.
They have a multilobed nucleus to store more genetic information.
They have a biconcave shape to increase their surface area to volume ratio.
They produce antibodies to neutralize toxins.
82 exam-style questions on OCR GCSE Biology 2.1 Supplying the cell, covering 2.1.1 Transport across cell membranes, 2.1.2 Mitosis and the cell cycle, 2.1.3 Importance of cell differentiation, and 2.1.4 Stem cells. Each one has a worked solution and a mark scheme showing where the marks go.