Combined Science 8464/2H June 2023

AQA GCSE Combined Science (8464) Jun 2023

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The June 2023 GCSE Combined Science Biology Paper 2 (Higher Tier) explores sexual reproduction, genetic variation, and inheritance, focusing on dominant and recessive alleles and embryo screening benefits. Topics in biodiversity include extinction estimates, antibiotic resistance, and environmental impacts of farming practices. Ecosystem dynamics are analyzed through plant distribution studies, selective breeding in salmon, and abiotic and biotic factor interactions. Homeostasis discussions cover temperature regulation, hormone interactions, and responses to hypothermia via adrenal and thyroid glands. Experimental methods include transect sampling and quantitative data interpretation. Keywords: biology, reproduction, inheritance, biodiversity, homeostasis, farming, ecosystems, hormones.