CAIE IGCSE Biology Extended 10.1.3 Pathogen Is Transmitted a By Direct Topic Practice

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IGCSE CAIE Biology

1. Characteristics and classification of living organisms

1.1 Characteristics of living organisms

1.2 Concept and uses of classification systems

1.3 Features of organisms

2. Organisation of the organism

2.1 Cell structure

2.2 Size of specimens

3. Movement into and out of cells

3.3 Active transport

4. Biological molecules

4.1 Biological molecules

6. Plant nutrition

6.1 Photosynthesis

6.2 Leaf structure

7. Human nutrition

7.2 Digestive system

7.3 Physical digestion

7.4 Chemical digestion

8. Transport in plants

8.1 Xylem and phloem

8.2 Water uptake

8.3 Transpiration

8.4 Translocation

9. Transport in animals

9.1 Circulatory systems

9.3 Blood vessels

10. Diseases and immunity

10.1 Diseases and immunity

10.1.1—Pathogen as a disease-causing organism

10.1.2—Transmissible disease as a disease

10.1.3—Pathogen is transmitted: (a) by direct

10.1.4—Body defences

10.1.5—Controlling disease spread

10.1.6—Active immunity as defence against

10.1.7—Each pathogen has its own antigens

10.1.8—Antibodies as proteins that bind

10.1.9—Specific antibodies have complementary

10.1.10—Active immunity is gained after

10.1.11—Process of vaccination: (a) weakened

10.1.12—Role of vaccination in controlling

10.1.13—Passive immunity is a short-term

10.1.14—Importance of breast-feeding

10.1.15—Memory cells are not produced

10.1.16—Cholera as a disease caused

10.1.17—Cholera bacterium produces a toxin

11. Gas exchange in humans

11.1 Gas exchange in humans

12. Respiration

12.1 Respiration

12.2 Aerobic respiration

12.3 Anaerobic respiration

13. Excretion in humans

13.1 Excretion in humans

14. Coordination and response

14.1 Coordination and response

14.2 Sense organs

14.4 Homeostasis

14.5 Tropic responses

16. Reproduction

16.1 Asexual reproduction

16.2 Sexual reproduction

16.3 Sexual reproduction in plants

16.4 Sexual reproduction in humans

16.5 Sex hormones in humans

16.6 Sexually transmitted infections

17. Inheritance

17.1 Chromosomes, genes and proteins

17.4 Monohybrid inheritance

18. Variation and selection

18.2 Adaptive features

19. Organisms and their environment

19.1 Energy flow

19.2 Food chains and food webs

19.3 Nutrient cycles

19.4 Populations

20. Human influences on ecosystems

20.1 Food supply

20.2 Habitat destruction

20.4 Conservation

21. Biotechnology and genetic modification

21.1 Biotechnology and genetic modification

21.2 Biotechnology

21.3 Genetic modification

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