Combined Science 8464/2H June 2019

AQA GCSE Combined Science (8464) Jun 2019

معلم موافق رایگان بودن است.

The June 2019 GCSE Combined Science Biology Paper 2 (Higher Tier) examines reaction times influenced by caffeine intake, climate change effects, and carbon cycling. Topics include genetic engineering, such as herbicide-resistant crops, and the implications of the Human Genome Project. Ecosystems are explored through quadrat sampling, biotic and abiotic factors affecting species distribution, and population estimation. Homeostasis is analyzed through blood glucose regulation, diabetes diagnosis, and enzyme inhibition in toxic hypoglycemia syndrome. Evolutionary adaptations are discussed in orchids, focusing on DNA changes, protein synthesis, and species relationships. Keywords: biology, reaction time, carbon cycle, genetic engineering, homeostasis, ecosystems, evolution.