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Biology · Combined Science

Organisation

Spec 4.2 Paper 1 📙 Higher

Subtopics

Principles of OrganisationSpec 4.2.1Describe the levels of organisation in living organisms from cells to organisms. + The Digestive SystemSpec 4.2.2.1Describe the organs of the digestive system and what happens to food at each stage. + EnzymesSpec 4.2.2.2Explain how enzymes work, how temperature and pH affect them, and describe the lock and key model. + The Heart and Blood VesselsSpec 4.2.3Describe the structure and function of the heart, the double circulatory system and the three types of blood vessel. + BloodSpec 4.2.3.2Describe the four components of blood and the function of each. + Coronary Heart DiseaseSpec 4.2.3.3Describe the causes and treatments of coronary heart disease. + Health, Disease and Risk FactorsSpec 4.2.4Define health and disease, distinguish communicable from non-communicable diseases, and explain risk factors. + CancerSpec 4.2.4.1Explain how cancer develops, the difference between benign and malignant tumours, and how cancer is treated. + Plant Tissues and OrgansSpec 4.2.5Describe the tissues found in plant organs and how they are adapted to their functions. + TranspirationSpec 4.2.5.2Describe transpiration and the factors that affect its rate. + TranslocationSpec 4.2.5.3Describe translocation and how it differs from transpiration. +

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Key Equations

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⭐ Higher Tier Content

Coronary heart disease — treatments

Plant transport — xylem and phloem

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