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Pearson Edexcel International GCSE Biology (4BI1)

1 The nature and variety of living organisms

2 Structure and functions in living organisms

(a) Level of organisation

(b) Cell structure

(c) Biological molecules

(d) Movement of substances into and out of cells

(f) Respiration

(g) Gas exchange

(j) Co-ordination and response

2.80 Responses to environmental change

2.81 Homeostasis

2.82 Stimulus, receptor and effector

2.83 Plant responses to stimuli

2.84 Tropic responses

2.85 Auxin and phototropism

2.86 Nervous and hormonal communication

2.87 Central nervous system

2.88 Nerve impulses and rapid responses

2.89 Neurotransmitters at synapses

2.90 Simple reflex arc

2.91 Eye structure and function

2.92 Eye focusing and light responses

2.93 Skin and temperature regulation

2.94 Adrenaline, insulin and reproductive hormones

2.95B ADH, FSH and LH

3 Reproduction and inheritance

4 Ecology and the environment

5 Use of biological resources

6 Experimental skills

7 Mathematical skills

IGCSE/Edexcel/Biology//Concept/2 Structure and functions in living organisms/(j) Co-ordination and response/2.84 Tropic responses

2 Structure and functions in living organisms

Syllabus: 2024
Section: 2
Level: —

Exam analysis

Most tested topics

(a) Level of organisation
(b) Cell structure
(c) Biological molecules
(d) Movement of substances into and out of cells
(e) Nutrition
(f) Respiration
(g) Gas exchange
(h) Transport
(i) Excretion
(j) Co-ordination and response