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Course: Igcse Biology
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Igcse Biology

1. Characteristics and Classification of Living Organisms

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2. Organisation of the Organism

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3. Movement into and out of Cells

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4. Biological Molecules

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5. Enzymes

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6. Plant Nutrition

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7. Human Nutrition

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8. Transport in Plants

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9. Transport in Animals

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10. Diseases and Immunity

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11. Gas Exchange in Humans

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12. Respiration

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13. Excretion in Humans

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14. Coordination and Response

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15. Drugs

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16. Reproduction

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17. Inheritance

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18. Variation and Selection

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19. Organisms and their Environment

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20. Human Influences on Ecosystems

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21. Biotechnology and Genetic Modification

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Quiz

19. Organisms and Their Environment — Extended practice (51 questions)

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Practise food webs, energy transfer, nutrient cycles and population growth with 51 questions.

Study Organisms and Their Environment, including the explanations of energy pyramids, nitrification and stationary population growth.

For detailed revision, also study Nutrient cycles and Populations.

  • Questions count: 50
  • Passing grade: B+
Start Quiz
1.
IGCSE Biology 19.1 Energy flow and consumers - Question 14
IGCSE Biology 19.1 Energy flow and consumers - Question 14
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B
C
D
2.
IGCSE Biology 19.1 Energy flow and consumers - Question 6
IGCSE Biology 19.1 Energy flow and consumers - Question 6
A
B
C
D
3.
Which statement best describes Food web?
The position of an organism in a food chain, food web or ecological pyramid.
An animal that gets its energy by eating plants.
An organism that gets its energy from dead or waste organic material.
A network of interconnected food chains.
4.
IGCSE Biology 19.1 Energy flow and consumers - Question 8
IGCSE Biology 19.1 Energy flow and consumers - Question 8
A
B
C
D
5.
Energy is lost between trophic levels mainly as:
Chemical energy in producers
Heat from respiration
Light
Sound
6.
IGCSE Biology 19.2 Food chains, food webs and pyramids - Question 11
IGCSE Biology 19.2 Food chains, food webs and pyramids - Question 11
A
B
C
D
7.
IGCSE Biology 19.2 Food chains, food webs and pyramids - Question 4
IGCSE Biology 19.2 Food chains, food webs and pyramids - Question 4
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B
C
D
8.
IGCSE Biology 19.2 Food chains, food webs and pyramids - Question 15
IGCSE Biology 19.2 Food chains, food webs and pyramids - Question 15
A
B
C
D
9.
IGCSE Biology 19.1 Energy flow and consumers - Question 10
IGCSE Biology 19.1 Energy flow and consumers - Question 10
A
B
C
D
10.
IGCSE Biology 19.1 Energy flow and consumers - Question 1
IGCSE Biology 19.1 Energy flow and consumers - Question 1
A
B
C
D
11.
Approximately what percentage of energy passes to the next trophic level?
90%
50%
1%
10%
12.
The main source of energy for most food chains is:
The Sun
Soil
Water
Decomposers
13.
A pyramid of energy is always:
Inverted
Flat
Pyramid-shaped
Rectangular
14.
IGCSE Biology 19.2 Food chains, food webs and pyramids - Question 1
IGCSE Biology 19.2 Food chains, food webs and pyramids - Question 1
A
B
C
D
15.
Which bacteria convert ammonium ions to nitrate?
Denitrifying bacteria
Nitrogen-fixing bacteria
Decomposers
Nitrifying bacteria
16.
IGCSE Biology 19.2 Food chains, food webs and pyramids - Question 14
IGCSE Biology 19.2 Food chains, food webs and pyramids - Question 14
A
B
C
D
17.
IGCSE Biology 19.2 Food chains, food webs and pyramids - Question 6
IGCSE Biology 19.2 Food chains, food webs and pyramids - Question 6
A
B
C
D
18.
IGCSE Biology 19.2 Food chains, food webs and pyramids - Question 7
IGCSE Biology 19.2 Food chains, food webs and pyramids - Question 7
A
B
C
D
19.
IGCSE Biology 19.1 Energy flow and consumers - Question 13
IGCSE Biology 19.1 Energy flow and consumers - Question 13
A
B
C
D
20.
Producers make food by:
Respiration
Digestion
Decomposition
Photosynthesis
21.
IGCSE Biology 19.1 Energy flow and consumers - Question 4
IGCSE Biology 19.1 Energy flow and consumers - Question 4
A
B
C
D
22.
Why are food chains usually short?
Consumers are large
Producers are rare
Energy is lost at each trophic level
Decomposers remove organisms
23.
A pyramid of numbers shows:
Biomass only
Number of organisms at each trophic level
Temperature
Energy only
24.
IGCSE Biology 19.1 Energy flow and consumers - Question 15
IGCSE Biology 19.1 Energy flow and consumers - Question 15
A
B
C
D
25.
Which statement best describes Trophic level?
An animal that gets its energy by eating plants.
The position of an organism in a food chain, food web or ecological pyramid.
A group of organisms of one species living in the same area at the same time.
An organism that gets its energy from dead or waste organic material.
26.
IGCSE Biology 19.2 Food chains, food webs and pyramids - Question 13
IGCSE Biology 19.2 Food chains, food webs and pyramids - Question 13
A
B
C
D
27.
IGCSE Biology 19.1 Energy flow and consumers - Question 7
IGCSE Biology 19.1 Energy flow and consumers - Question 7
A
B
C
D
28.
IGCSE Biology 19.2 Food chains, food webs and pyramids - Question 2
IGCSE Biology 19.2 Food chains, food webs and pyramids - Question 2
A
B
C
D
29.
Which pyramid can never be inverted?
Pyramid of numbers
Pyramid of biomass
Pyramid of energy
Pyramid of population
30.
IGCSE Biology 19.1 Energy flow and consumers - Question 5
IGCSE Biology 19.1 Energy flow and consumers - Question 5
A
B
C
D
31.
Which statement best describes Ecosystem?
An organism that gets its energy from dead or waste organic material.
The position of an organism in a food chain, food web or ecological pyramid.
A unit containing the community of organisms and their environment, interacting together.
A network of interconnected food chains.
32.
IGCSE Biology 19.2 Food chains, food webs and pyramids - Question 8
IGCSE Biology 19.2 Food chains, food webs and pyramids - Question 8
A
B
C
D
33.
A food web is:
A single food chain
A network of interconnected food chains
A pyramid
A cycle of water
34.
IGCSE Biology 19.2 Food chains, food webs and pyramids - Question 12
IGCSE Biology 19.2 Food chains, food webs and pyramids - Question 12
A
B
C
D
35.
IGCSE Biology 19.1 Energy flow and consumers - Question 12
IGCSE Biology 19.1 Energy flow and consumers - Question 12
A
B
C
D
36.
Which statement best describes Herbivore?
A unit containing the community of organisms and their environment, interacting together.
An animal that gets its energy by eating other animals.
A network of interconnected food chains.
An animal that gets its energy by eating plants.
37.
IGCSE Biology 19.2 Food chains, food webs and pyramids - Question 10
IGCSE Biology 19.2 Food chains, food webs and pyramids - Question 10
A
B
C
D
38.
A primary consumer is:
A decomposer
A herbivore that eats producers
A top predator
A plant
39.
Which process returns carbon dioxide to the air?
Photosynthesis
Respiration
Fossilisation
Nitrification
40.
IGCSE Biology 19.2 Food chains, food webs and pyramids - Question 3
IGCSE Biology 19.2 Food chains, food webs and pyramids - Question 3
A
B
C
D
41.
In a food chain, arrows show:
The direction of energy flow
Oxygen flow
What eats what backwards
Water flow
42.
IGCSE Biology 19.2 Food chains, food webs and pyramids - Question 9
IGCSE Biology 19.2 Food chains, food webs and pyramids - Question 9
A
B
C
D
43.
IGCSE Biology 19.1 Energy flow and consumers - Question 9
IGCSE Biology 19.1 Energy flow and consumers - Question 9
A
B
C
D
44.
IGCSE Biology 19.1 Energy flow and consumers - Question 2
IGCSE Biology 19.1 Energy flow and consumers - Question 2
A
B
C
D
45.
IGCSE Biology 19.2 Food chains, food webs and pyramids - Question 5
IGCSE Biology 19.2 Food chains, food webs and pyramids - Question 5
A
B
C
D
46.
What do arrows in a food chain represent?
The direction of energy transfer
Which organism is larger
The flow of carbon dioxide
The direction of movement
47.
IGCSE Biology 19.1 Energy flow and consumers - Question 3
IGCSE Biology 19.1 Energy flow and consumers - Question 3
A
B
C
D
48.
In the stationary phase of a population curve:
Birth rate is higher than death rate
Birth rate equals death rate
There are no deaths
Food is unlimited
49.
The position of an organism in a food chain is its __________ level.
food
feeding web
energy
trophic
50.
Food chains rarely have more than five trophic levels because energy is lost at each level.
True
False
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Part of 19. Organisms and their Environment — see every lesson and quiz in this unit.
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