Twenty First Century Science - Biology B - J257

7 sections available · 32 chapters available

Free Twenty First Century Science - Biology B - J257 study notes for Cambridge OCR GCSE (9-1) students. Each chapter covers a key topic with examples and practice prompts you can continue inside the thinka app.

You and your genes

What is the genome and what does it do?
How is genetic information inherited?
How can and should gene technology be used?

Keeping healthy

What are the causes of disease?
How do organisms protect themselves against pathogens?
How can we prevent the spread of infections?
How can we identify the cause of an infection?
How can lifestyle, genes and the environment affect my health?
How can we treat disease?

Living together – food and ecosystems

What happens during photosynthesis?
How do producers get the substances they need?
How are organisms in an ecosystem interdependent?
How are populations affected by conditions in an ecosystem?

Using food and controlling growth

What happens during cellular respiration?
How do we know about mitochondria and other cell structures?
How do organisms grow and develop?
How is plant growth controlled?
Should we use stem cells to treat damage and disease?

The human body – staying alive

How do substances get into, out of and around our bodies?
How does the nervous system help us respond to changes?
How do hormones control responses in the human body?
Why do we need to maintain a constant internal environment?
What role do hormones play in human reproduction?
What can happen when organs and control systems stop working?

Life on Earth – past, present and future

How was the theory of evolution developed?
How do sexual and asexual reproduction affect evolution?
How does our understanding of biology help us classify the diversity of organisms on Earth?
How is biodiversity threatened and how can we protect it?

Ideas about Science

What needs to be considered when investigating a phenomenon scientifically?
What conclusions can we make from data?
How are scientific explanations developed?
How do science and technology impact society?

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