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4.2 Organisation

6 dot points across 6 inquiry questions. Click any dot point for a focused answer with worked past exam questions where available.

What are the components of blood, and how is each one adapted to its function?

Blood as a tissue made of plasma, red blood cells, white blood cells and platelets, the function of each component, and how red blood cells are adapted to carry oxygen.
A focused answer to AQA GCSE Biology 4.2.2, covering blood as a tissue, the functions of plasma, red blood cells, white blood cells and platelets, and the adaptations of red blood cells for carrying oxygen.
9 min answer →

What is health, and how do lifestyle and non-communicable diseases such as cancer affect the body?

The definition of health, the difference between communicable and non-communicable disease, risk factors for non-communicable diseases, the effect of lifestyle, the development of cancer, and the interaction of different diseases.
A focused answer to AQA GCSE Biology 4.2.2, covering the definition of health, communicable and non-communicable disease, risk factors and lifestyle, the development of cancer, and how diseases interact.
9 min answer →

How are plant tissues organised, and how do plants transport water and food?

Plant tissues and organs, the structure and function of the leaf, the roles of xylem and phloem, transpiration and translocation, and the effect of environmental factors on the rate of transpiration.
A focused answer to AQA GCSE Biology 4.2.3, covering plant tissues and organs, leaf structure, xylem and phloem, transpiration and translocation, and the factors that affect transpiration rate.
10 min answer →

How are cells organised into tissues, organs and organ systems to keep an organism alive?

The levels of organisation from cells to tissues, organs and organ systems, the meaning of each level, and how the digestive system is an example of an organ system, including the action of enzymes.
A focused answer to AQA GCSE Biology 4.2.1, covering the levels of organisation from cells to tissues, organs and organ systems, with the digestive system as the worked example.
8 min answer →

How do enzymes digest food, and how does the digestive system absorb nutrients?

The action of enzymes as biological catalysts, the lock and key model, the effect of temperature and pH on enzyme activity, the products of digestion, and the role of bile, with the food tests for the required practical.
A focused answer to AQA GCSE Biology 4.2.2, covering enzymes as biological catalysts, the lock and key model, the effect of temperature and pH, the products of digestion, the role of bile, and the food tests required practical.
10 min answer →

How does the heart pump blood around the body, and how are the blood vessels adapted to their jobs?

The structure of the heart and the double circulatory system, the roles of the arteries, veins and capillaries, how the heart rate is controlled, and the structure and function of the lungs in gas exchange.
A focused answer to AQA GCSE Biology 4.2.2, covering the structure of the heart, the double circulatory system, the three types of blood vessel, control of heart rate, and the structure of the lungs for gas exchange.
10 min answer →