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Biology for IGCSE & O level - Human Influences On Ecosystems (Section 2)

1
What is the main cause of the increase in the amount of carbon dioxide in the atmosphere?
Answer
(B)
Burning fossil fuels
2
What is the potential impact of climate change on agriculture?
Answer
(C)
Shifts in suitable growing regions.
3
Which of the following is a major pollutant that can lead to land pollution?
Answer
(C)
Plastics
4
What is one of the major effects of releasing of greenhouse gasses?
Answer
(B)
Melting of the polar ice caps
5
What does the text mention as a benefit of establishing national parks?
Answer
(B)
To protect areas from human intervention.
6
Which are the sustainable practices for fishing?
Answer
A
B
7
Which environmental issue is directly linked to the burning of fossil fuels?
Answer
(C)
Global warming
8
What is a significant consequence of deforestation?
Answer
(B)
Loss of habitat.
9
What is a likely consequence of habitat destruction?
Answer
(B)
Decreased genetic diversity.
10
What are the ways to prevent species becoming extinct?
Answer
A
B
C
11
What is a primary reason for the decline in amphibian populations?
Answer
(B)
Habitat destruction.
12
Which of the following is a key characteristic of a sustainable timber production?
Answer
(C)
Replanting trees after harvesting.
13
Which of the following is a key factor contributing to species becoming endangered?
Answer
(C)
Habitat destruction.
14
What human actions pose the greatest threat to species?
Answer
A
B
C
D
15
What is a key characteristic of an endangered species?
Answer
(B)
It is under immediate threat of becoming extinct.
16
What is a major cause of the loss of biodiversity in many ecosystems?
Answer
(D)
All of the above
17
What is the role of the ozone layer in the Earth's atmosphere?
Answer
(B)
To absorb harmful ultraviolet radiation.
18
What is the primary threat to the survival of many species?
Answer
(C)
Habitat loss.
19
What is a key factor that contributes to the greenhouse effect?
Answer
(B)
Increased levels of carbon dioxide.
20
Which of the following is an example of a selective breeding method?
Answer
(B)
Breeding plants that are resistant to pests
21
What is the primary difference between renewable and non-renewable resources?
Answer
(C)
Renewable resources can be replaced, non-renewable resources cannot.
22
Which of the following is a method of ex-situ conservation?
Answer
A
B
C
23
Which activities contribute to the destruction of habitats?
Answer
A
B
C
24
Which is a primary contributor to air pollution?
Answer
(B)
Industrial emissions
25
Which human activity is LEAST likely to contribute to the endangerment of a species?
Answer
(C)
Reducing pollution.
26
Which human actions are causing the decline in species?
Answer
A
B
D
27
What is the key goal of using artificial insemination in captive breeding?
Answer
(B)
To control the breeding process.
28
What is a potential consequence of introducing non-native species into an ecosystem?
Answer
(C)
Competition with native species.
29
What does the term 'extinction' mean?
Answer
(C)
The complete disappearance of a species.
30
Which of the following is an example of in-situ conservation?
Answer
(C)
A national park.
31
What is the effect of small population sizes in species?
Answer
(B)
Reduced ability to adapt to change.
32
What is the environmental impact of sewage discharge?
Answer
(D)
All of the above
33
What is the main reason for the decline in biodiversity?
Answer
(B)
Habitat destruction
34
What is the main environmental impact of sewage pollution?
Answer
(B)
Eutrophication
35
Which of the following is a long-term effect of excessive fertilizer use on aquatic ecosystems?
Answer
(B)
Eutrophication
36
What does it mean for a species to be 'endangered'?
Answer
(B)
The species is facing a very high risk of extinction.
37
What is a significant health risk associated with air pollution?
Answer
(B)
Respiratory illnesses
38
Which factors are related to climate change that impact species?
Answer
A
B
D
39
Which activity is NOT a major contributor to the loss of biodiversity?
Answer
(D)
Controlled breeding
40
Which of the following is NOT a source of water pollution?
Answer
(D)
Solar radiation
41
What is the main environmental impact of using pesticides in agriculture?
Answer
(B)
Pollution of water resources
42
What is the main environmental impact of waste plastic?
Answer
(B)
Water and land pollution.
43
What is the main cause of the enhanced greenhouse effect?
Answer
(C)
Increased levels of greenhouse gases
44
What is the main benefit of species monitoring?
Answer
(B)
To track and assess population trends.
45
What is a major source of plastic pollution in the oceans?
Answer
(C)
Improper waste disposal
46
What is a goal of reintroduction programs?
Answer
(B)
To return species to their original ecosystems.
47
What is the primary goal of captive breeding programs?
Answer
(B)
To release endangered species back into the wild.
48
Which of the following are examples of conservation efforts?
Answer
A
B
D
49
What is a key benefit of preserving the genetic diversity within a species?
Answer
(B)
It helps the species to adapt to changing environments.
50
What is the impact of habitat destruction on a species?
Answer
(B)
Reduced food and shelter.