Higher Tier Biology Paper 2H
(Merged Question Paper and Marking Scheme) |
Friday 7 June 2024
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GCSE
COMBINED SCIENCE: TRILOGY
Higher Tier
H
Biology Paper 2H
Friday 7 June 2024 AfternoonTime allowed: 1 hour 15 minutes
Materials
For Examiner’s Use
For this paper you must have:
• a ruler Question Mark
• a scientific calculator.
1
Instructions 2
• Use black ink or black ball-point pen. 3
• Pencil should only be used for drawing.
4
• Fill in the boxes at the top of this page.
• Answer all questions in the spaces provided. 5
• If you need extra space for your answer(s), use the lined pages at the end of 6
this book. Write the question number against your answer(s).
• Do all rough work in this book. Cross through any work you do not want to be TOTAL
marked.
• In all calculations, show clearly how you work out your answer.
Information
• The maximum mark for this paper is 70.
• The marks for questions are shown in brackets.
• You are expected to use a calculator where appropriate.
• You are reminded of the need for good English and clear presentation in your answers.
*JUN248464B2H01*
IB/M/Jun24/G4005/E7 8464/B/2H
,GCSE Combined Science: Trilogy Higher Tier Biology Paper 2H Summary
The GCSE Combined Science: Trilogy Higher Tier Biology Paper 2H, scheduled for June
2025, will assess students' understanding of advanced biological concepts and their ability to
apply this knowledge in complex scenarios. This paper builds on the foundational biology
topics from Paper 1 and introduces more in-depth content, requiring students to analyze,
evaluate, and solve problems. The key areas of study covered in this paper include:
1. Cell Recognition and the Immune System:
o The immune response, including the roles of white blood cells, antibodies, and
antigens in fighting infections.
o The process of phagocytosis and how the body defends against pathogens.
o The concept of vaccination, how vaccines stimulate the immune system, and
herd immunity.
o Antibiotics and the issue of antibiotic resistance, including how resistant
bacteria emerge and spread.
2. Homeostasis and Response:
o Detailed understanding of homeostasis, the regulation of body temperature,
blood glucose levels, and water balance.
o The role of the nervous system in detecting and responding to changes in the
environment (stimuli).
o The structure and function of the brain and spinal cord.
o The endocrine system, including hormones such as insulin and adrenaline, and
their roles in maintaining balance within the body.
o The control of the menstrual cycle, including the role of hormones like estrogen
and progesterone.
3. Inheritance, Variation, and Evolution:
o The structure of DNA, genes, and chromosomes, and how genetic information
is inherited.
o The role of mutations in genetic variation and their effects on organisms.
o The use of Punnett squares to predict the inheritance of traits (dominant and
recessive alleles).
o Evolution by natural selection, including the survival of advantageous traits in a
population over time.
o The process of speciation and how new species are formed.
4. Ecology:
o The study of ecosystems and the flow of energy through food chains and food
webs.
o The role of producers, consumers, and decomposers in ecosystems.
o The cycling of materials such as carbon and nitrogen, and the importance of
these cycles in maintaining ecosystem stability.
o The impact of human activity on the environment, including pollution,
deforestation, and climate change.
o Conservation strategies and the importance of protecting biodiversity to ensure
the health of ecosystems.
5. Plant Biology:
o Photosynthesis: the process of converting light energy into chemical energy,
including the factors that affect its rate (e.g., light intensity, temperature, and
carbon dioxide concentration).
o The structure of the leaf and how it is adapted for photosynthesis.
o The transport of water and nutrients in plants via the xylem and phloem.
o The role of transpiration in water movement within plants.
6. The Use of Biological Resources:
o The role of biotechnology and genetic engineering in agriculture, including the
use of GM crops to increase yield and resistance to disease.
o The use of selective breeding to enhance desirable traits in plants and animals.
o Ethical considerations in the use of biotechnology, including the risks and
benefits of genetically modified organisms (GMOs).
, human activities on food production.
7. Human Impact on the Environment:
o Human-induced changes to ecosystems, such as urbanization, farming, and
industrialization.
o The consequences of air, water, and land pollution, including the effects of
burning fossil fuels and the release of greenhouse gases.
o The challenges posed by climate change and global warming, and the potential
consequences for biodiversity and ecosystems.
o The role of conservation efforts, renewable energy, and sustainable practices in
mitigating the environmental impact of human activities.
8. Health and Disease:
o Understanding non-communicable diseases such as cancer, cardiovascular
disease, and diabetes, including the risk factors and prevention methods.
o The importance of lifestyle choices (e.g., diet, exercise, smoking) in maintaining
good health.
o The role of public health initiatives in controlling the spread of diseases.
This paper will require students to apply their knowledge to complex biological systems, use
critical thinking to evaluate scientific data, and solve problems related to real-life biological
scenarios.
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IB/M/Jun24/8464/B/2H