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PAPER-4-TOPIC-WISE-SOLVED-PAST PAPERS / 21-HUMAN INFLUENCES ON ECOSYSTEMS
  • 21.1-Leaching-Eutrophication.pdf
  • 21.2-Sewage-Water pollution.pdf
  • 21.3-Untreated garbage.pdf
  • 21.4-Recycling.pdf
  • 21.5-Greenhouses gases-effect.pdf
  • 21.6-Water pollution.pdf
  • 21.7-Persiatent pollutants ill-effects.pdf
  • 21.8-Sewage treatment.pdf
  • 21.9-Ions-Manure-Chemical fertilisers.pdf
  • 21.10-Ecosystems-Conservation.pdf
  • 21.11-Greenhouse gases-Sweage treatment.pdf
  • 21.12-Deforestation.pdf
  • 21.13-Acid rain.pdf
  • 21.14-Deforestation-Soil erosion.pdf
  • 21.15-Pollution.pdf
  • 21.16-Raw sewage in water-Greenhouse gas.pdf
  • 21.17-Treating raw sewage.pdf
Note:

IGCSE Biology Worksheets with Answers Paper 4 Human Influences on Ecosystems

Course content

IGCSE Biology Revision Notes Free Preview
Paper 2 Topic Questions IGCSE Biology Free Preview
Paper 4 Topic Questions IGCSE Biology Free Preview
Paper 6 Topic Questions IGCSE Biology Free Preview
IGCSE Biology Solved Past Exam Papers Free Preview
IGCSE Biology Video Lessons Free Preview
1-Characteristics and classification of living organisms-2023-2025-exams
Topic-2-Organisation-of-the-organism
Topic-3-Movement-into-and-out-of-cells
Topic-4-Biological-molecules
Topic-5-Enzymes
Topic 6 Plant Nutrition
Topic 7 Human nutrition
Topic 8 - Transport in plants
Topic-9 Transport in animals
Topic 10- Diseases and immunity
Topic 11- Gas exchange in humans
Topic 12- Respiration
Topic 13- Excretion in humans
Topic 14- Coordination and response
Topic 15- Drugs
Topic 16 - Reproduction
Topic 17-Inheritance
Topic 18- Variation and selection
Topic 19- Organisms and their environment
Topic 20- Human influences on ecosystems
Topic 21- Biotechnology and genetic modification
1-CHARACTERISTICS AND CLASSIFICATION OF LIVING ORGANISMS
2-ORGANISATION OF THE ORGANISM
3-MOVEMENT IN AND OUT OF CELLS
4-BIOLOGICAL MOLECULES
5-ENZYMES
6-PLANT NUTRITION
7-ANIMAL NUTRITION
8-TRANSPORT IN PLANTS
9-TRANSPORT IN ANIMALS
10-DISEASE AND IMMUNITY
11-GAS EXCHANGE IN HUMANS
12-RESPIRATION
13-EXCRETION IN HUMANS
14-COORDINATION AND RESPONSE
15-DRUGS
16-REPRODUCTION
17-INHERITANCE
18-VARIATION AND SELECTION
19-ORGANISMS AND THEIR ENVIRONMENT
20-BIOTECHNOLOGY AND GENETIC ENGINEERING
21-HUMAN INFLUENCES ON ECOSYSTEMS
1-CHARACTERISTICS AND CLASSIFICATION OF LIVING ORGANISMS
2-ORGANISATION OF THE ORGANISM
3-MOVEMENT IN AND OUT OF CELLS
4-BIOLOGICAL MOLECULES
5-ENZYMES
6-PLANT NUTRITION
7-ANIMAL NUTRITION
8-TRANSPORT IN PLANTS
9-TRANSPORT IN ANIMALS
10-DISEASE AND IMMUNITY
11-GAS EXCHANGE IN HUMANS
12-RESPIRATION
13-EXCRETION IN HUMANS
14-COORDINATION AND RESPONSE
15-DRUGS
16-REPRODUCTION
17-INHERITANCE
18-VARIATION AND SELECTION
19-ORGANISMS AND THEIR ENVIRONMENT
20-BIOTECHNOLOGY AND GENETIC ENGINEERING
21-HUMAN INFLUENCES ON ECOSYSTEMS
1-CHARACTERISTICS AND CLASSIFICATION OF LIVING ORGANISMS
2-ORGANISATION OF THE ORGANISM
3-MOVEMENT IN AND OUT OF CELLS
4-BIOLOGICAL MOLECULES
5-ENZYMES
6-PLANT NUTRITION
7-ANIMAL NUTRITION
8-TRANSPORT IN PLANTS
9-TRANSPORT IN ANIMALS
10-DISEASE AND IMMUNITY
11-GAS EXCHANGE IN HUMANS
12-RESPIRATION
13-EXCRETION IN HUMANS
14-COORDINATION AND RESPONSE
15-DRUGS
16-REPRODUCTION
17-INHERITANCE
18-VARIATION AND SELECTION
19-ORGANISMS AND THEIR ENVIRONMENT
20-BIOTECHNOLOGY AND GENETIC ENGINEERING
21-HUMAN INFLUENCES ON ECOSYSTEMS
PLANNING INVESTIGATIONS
1-CHARACTERISTICS AND CLASSIFICATION OF LIVING ORGANISMS
2-ORGANISATION OF THE ORGANISM
3-MOVEMENT IN AND OUT OF CELLS
4-BIOLOGICAL MOLECULES
5-ENZYMES
6-PLANT NUTRITION
7-ANIMAL NUTRITION
8-TRANSPORT IN PLANTS
9-TRANSPORT IN ANIMALS
12-RESPIRATION
14-COORDINATION AND RESPONSE
16-REPRODUCTION
18-VARIATION AND SELECTION
19-HUMAN INFLUENCES ON ECOSYSTEMS
20-BIOTECHNOLOGY AND GENETIC ENGINEERING
PAPER-2-YEARWISE SOLVED PAST PAPERS
PAPER-4-YEARWISE SOLVED PAST PAPERS
PAPER-6-YEARWISE SOLVED PAST PAPERS
1-Characteristics and classification of living organisms
2-Organisation of the organism
3-Movement into and out of cells Set 1
4-Biological molecules video lectures
5-Enzymes
6-Plant Nutrition
7 Human nutrition
8-Transport in Plants
9-Transport in animals
10-Diseases and Immunity
11-Gas Exchange
12-Respiration
13-Excretion in humans
14- Coordination and Response Set 1
14- Coordination and Response Set 2
14- Coordination and Response Set 3
15- Drugs
16-Reproduction Set 1
16-Reproduction Set 2
16-Reproduction Set 3
16-Reproduction Set 4
16-Reproduction Set 5
17-Inheritance
18-Variation and selection Set 1
19-Organisms and their environment Set 1
19-Organisms and their environment Set 2
20-Human-influences-on-ecosystems -Set 1
20-Human-influences-on-ecosystems -Set 2
20-Human-influences-on-ecosystems -Set 3
21-Biotechnology and Genetic Modification
SET-1-Based on May-2020-Variant-21-Extended
SET-1-Based on May-2020-Variant-11-Core for extra Practise
SET-2-Based on May-2020-Variant-12-Core for extra Practice
SPECIMEN PAPERS-2020 AND ABOVE
IGCSE LEARNER GUIDE
SYLLABUS AND SYLLABUS UPDATES