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Biology for IGCSE & O level - Human Influences On Ecosystems (Section 6)

1
What is the role of protected areas in addressing climate change?
Answer
(B)
They can act as carbon sinks, absorbing carbon dioxide.
2
Which of the following is NOT a benefit of reducing greenhouse gas emissions?
Answer
(C)
Decreased sea levels
3
What is the process of converting organic waste into fertilizer called?
Answer
(B)
Composting
4
What is the main effect of burning coal and other fossil fuels?
Answer
(B)
Release of greenhouse gases
5
What measures can be taken to protect forests?
Answer
A
B
C
6
What actions can individuals take to support conservation efforts?
Answer
A
B
C
7
What is the primary cause of the greenhouse effect?
Answer
(C)
The presence of greenhouse gases in the atmosphere.
8
Which of the following is an example of a point source of water pollution?
Answer
(C)
A sewage treatment plant discharge
9
What does the term 'ex situ' conservation refer to?
Answer
(B)
Conserving species outside of their natural habitat.
10
What is the process of 'eutrophication' driven by?
Answer
(A)
Excessive nutrients
11
How does the use of fertilizers in agriculture contribute to water pollution?
Answer
(C)
By causing algal blooms and depleting oxygen levels.
12
How can 'ecotourism' benefit conservation efforts?
Answer
(A)
It generates revenue for conservation and local communities.
13
What is the primary cause of the greenhouse effect?
Answer
(C)
The presence of greenhouse gases in the atmosphere
14
Which of the following is NOT a cause of habitat destruction?
Answer
(C)
Acid rain
15
What is the potential benefit of establishing wildlife corridors?
Answer
(C)
They connect fragmented habitats, allowing species to move.
16
What is a primary challenge in conducting species monitoring?
Answer
(B)
Accurately assessing population sizes and health.
17
What is a consequence of the greenhouse effect?
Answer
(B)
Global warming.
18
Which of the following is a characteristic of a healthy ecosystem?
Answer
(C)
A complex food web.
19
What is the main benefit of using 'sustainable timber production' methods?
Answer
(B)
It ensures a continuous supply of timber while minimizing environmental impact.
20
Which of these actions can help reduce the greenhouse effect?
Answer
(B)
Use less fossil fuels.
21
Which of the following is a result of soil erosion?
Answer
A
B
C
22
Which is a main source of water pollution from agriculture?
Answer
(B)
Pesticides and Fertilizers
23
What is 'habitat fragmentation'?
Answer
(B)
The division of a habitat into smaller, isolated patches.
24
What is a significant challenge in conserving ecosystems?
Answer
(C)
Many ecosystems are not fully understood.
25
What is the role of citizen science in conservation?
Answer
(B)
To involve the public in collecting and analyzing scientific data.
26
What are some ways to help protect native species from invasive species?
Answer
(B)
Preventing the introduction of non-native species.
27
Which human activities contribute to air pollution?
Answer
A
B
C
28
What does the term 'endemism' refer to?
Answer
(B)
A species found only in a specific geographic location.
29
Which of the following contributes to acid rain?
Answer
A
B
30
Which of the following is an example of an invasive species?
Answer
(C)
A species introduced to a new area that causes harm.
31
Which is a key strategy for managing waste and reducing pollution?
Answer
(B)
Promoting composting and recycling.
32
What is the main function of the atmosphere in relation to the greenhouse effect?
Answer
(B)
Absorbing and re-radiating some of the infrared radiation from the Earth.
33
Which of these is an example of a non-biodegradable waste product?
Answer
(B)
Plastic
34
Which of the following is a benefit of sustainable agriculture practices?
Answer
(B)
Reduced soil erosion and improved soil health.
35
What is the role of seed banks in conservation?
Answer
(B)
To store the seeds for future use.
36
What is the source of the greatest amount of greenhouse gases in the atmosphere?
Answer
(B)
Burning fossil fuels
37
What are the effects of plastic pollution?
Answer
A
B
38
What are some factors that contribute to the decline of fish stocks?
Answer
A
B
C
39
Which activity contributes the most to the greenhouse effect?
Answer
(C)
Burning fossil fuels
40
What are some potential benefits of restoring wetlands?
Answer
A
B
C
41
What is a possible consequence of ocean acidification?
Answer
(B)
Harm to shell-forming organisms.
42
What is the term for a species that is no longer found in the wild?
Answer
(B)
Extinct
43
What are the primary contributors to ocean acidification?
Answer
(C)
Increased levels of CO2 in the atmosphere.
44
What are the major greenhouse gases?
Answer
A
B
D
45
Which of the following actions is MOST likely to help conserve biodiversity?
Answer
(B)
Protecting and restoring habitats.
46
How does the greenhouse effect contribute to global warming?
Answer
(B)
By trapping heat in the atmosphere.
47
What are the negative effects of large-scale monoculture farming?
Answer
A
B
D
48
Which of the following are caused by water pollution?
Answer
A
B
49
What are some examples of sustainable practices related to fishing?
Answer
A
B
C
50
Which of the following is a technique used to conserve endangered species?
Answer
(C)
Captive breeding