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14 Oct 2020: Activity 1 – Zooming out: nation-states and their borders Political borders separate the territory of one state from the territory of another. There are 194 nation-states in the world today, and there are more than 300 land borders between them,

14 Oct 2020: Activity 2 – Zooming in: how people cross borders This activity invites you to critically reflect on the varied experiences of border crossing encountered by people around the world today. The activity also stimulates reflection about the social

14 Oct 2020: Activity 1 - How does the immune system work? The immune system did not evolve to stop humans carrying out organ transplants. Instead we evolved it over millions of years to stop us being invaded and attacked by a variety of prokaryotic and

14 Oct 2020: Activity 3 - Why is the Major Histocompatibility Complex so important? We saw in resource 2 that fetal trophoblast cells are perilously exposed to the maternal blood and immune system. So why are they not attacked as a foreign invader? Half of the

14 Oct 2020: Activity 4 - How might the mammalian fetus avoid immune attack? If you have read the other three resources for this topic, you will now be aware of the potential problem facing the embryo/fetus. Its trophoblast cells, presumably bearing

18 Oct 2020:

18 Oct 2020: Bone Identification Answers:. A – scapula. B – humerus. C – ulna. D – radius. E – carpal bones. F – metacarpal bones. G – phalanges. H – pelvis (composed of ilium, pubis and ischium). I – femur. J – tibia. K – fibula. L –

24 Oct 2020: Muscle Attachment and Function Answers. 1 – Cervical Trapezius -> Cranial rotator of the scapula. 2 – Thoracic Trapezius -> Caudal rotator of the scapula. 3 – Deltoid -> Shoulder flexor. 4 – Supraspinatus -> Shoulder extensor. 5 – Triceps -

5 Oct 2020: Activity - Genetic Drift. There are actually two processes by which organisms evolve at the genetic level. One is. through natural selection and you will be familiar with this through examples of antibiotic. resistance in bacteria and industrial

5 Oct 2020: Activity - Continuous Genetic Variation. Throughout most A-level courses, you will be introduced to traits whose variation is. apparently controlled by one or, just a small number of genes. For instance, when you learn. about dominance, you will