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Biology for IGCSE & O level - Human Influences On Ecosystems (Section 3)

1
What is a significant environmental consequence of excess fertilizer use?
Answer
(B)
Eutrophication of water bodies.
2
What type of action does the text highlight as potentially leading to species extinction?
Answer
(C)
Over-exploitation of resources.
3
What are some effects of deforestation on the environment?
Answer
B
C
D
4
What are some of the adverse effects of using pesticides?
Answer
A
B
5
Which of the following is an example of how monoculture can negatively affect the environment?
Answer
(C)
Higher susceptibility to pests and diseases
6
Which of the following is a consequence of intensive farming?
Answer
(C)
Overuse of antibiotics
7
What are some of the negative impacts of intensive farming?
Answer
A
B
C
8
Which of the following is a key factor contributing to global warming?
Answer
(C)
Deforestation
9
What is the primary cause of habitat destruction?
Answer
(B)
Deforestation
10
Which are the reasons for setting up the reserves?
Answer
A
C
11
What is a key advantage of using seed banks for conservation?
Answer
(C)
They preserve genetic diversity.
12
What is a major effect of ocean pollution caused by plastics?
Answer
(B)
Entanglement and ingestion by marine animals
13
What is one of the main advantages of artificial insemination in captive breeding programs?
Answer
(C)
It allows for the selection of specific traits.
14
What is the primary environmental concern associated with the greenhouse effect?
Answer
(C)
Global warming
15
What is the primary cause of eutrophication in aquatic ecosystems?
Answer
(B)
Excessive nutrient input
16
Which of the following human activities contributes to the greenhouse effect?
Answer
A
B
C
17
What is the aim of reducing habitat destruction?
Answer
(D)
To maintain diverse ecosystems.
18
Which of the following is a key issue caused by plastic pollution?
Answer
(B)
Entanglement and ingestion by marine animals.
19
What are some sustainable fishing methods?
Answer
A
C
D
20
What is one of the primary sources of greenhouse gases in the atmosphere?
Answer
(C)
Burning fossil fuels.
21
What is a potential negative consequence of captive breeding programs?
Answer
(C)
Loss of genetic variation.
22
What is a key characteristic of a sustainable farming practice?
Answer
(C)
Minimizing environmental impact.
23
Which of the following is a source of the greenhouse gas, methane?
Answer
(C)
Livestock farming.
24
What is the main cause of ocean acidification?
Answer
(B)
Absorption of excess carbon dioxide from the atmosphere
25
What is a potential benefit of genetically modified crops?
Answer
(C)
Increased crop yields
26
What does 'in vitro fertilization' involve?
Answer
(A)
Fertilizing eggs outside of the body.
27
What is the most significant threat to a species' survival?
Answer
(B)
Habitat loss and degradation.
28
Which of the following activities is a major contributor to water pollution?
Answer
A
B
C
29
What is one of the environmental concerns associated with the excessive use of fertilizers?
Answer
(B)
Eutrophication of water bodies
30
Which practice is most likely to promote the conservation of a species?
Answer
(B)
Reducing pollution levels.
31
What is the primary goal of species monitoring programs?
Answer
(B)
To track the numbers and health of a species.
32
Which of the following are considered negative consequences of the use of herbicides?
Answer
A
C
33
What is a significant effect of overfishing on marine ecosystems?
Answer
(B)
Collapse of fish populations.
34
What are the key components that can be preserved for longer duration?
Answer
A
B
C
35
What is the primary threat to the survival of species?
Answer
(A)
Climate change.
36
Which of the following best describes 'species monitoring' as a conservation technique?
Answer
(B)
Tracking and recording the population size of animals.
37
What is a major advantage of introducing native species into their historical range?
Answer
(C)
It can restore ecosystem functions.
38
What are the ways to preserve the seed?
Answer
A
B
39
Which factors contribute to the endangerment of species?
Answer
A
B
C
40
In the context of the provided text, what is the primary threat to the survival of amphibian stocks?
Answer
(C)
Climate change.
41
What is a key objective of sustainable fishing?
Answer
(B)
To maintain healthy fish populations.
42
What are the negative impacts of human activities?
Answer
A
B
D
43
What are the primary greenhouse gases?
Answer
A
C
44
Which of the following is a major contributor to the greenhouse effect?
Answer
(C)
Carbon dioxide
45
What is a key factor in preventing species from becoming endangered?
Answer
(C)
Protecting the natural habitat.
46
What are the benefits of establishing protected areas?
Answer
A
B
D
47
What is the consequence of having a lot of plastics in the environment?
Answer
(B)
Land pollution
48
What is the primary reason for establishing marine protected areas?
Answer
(C)
To give refuge for fish and other marine life.
49
What is the main goal of establishing protected areas like national parks?
Answer
(C)
To conserve biodiversity and habitats.
50
What is a major contributing factor to global climate change?
Answer
(B)
Deforestation.