MCQs MDC 1 Life Science

1. Which of the following is an effect of climate change on biodiversity?

A) Decreased frequency of extreme weather events

B) Increased habitat stability for various species

C) Shifts in species' ranges and migration patterns

D) Reduction in greenhouse gas emissions

2. How does climate change affect marine biodiversity?

A) Increased ocean acidity promotes biodiversity

b) Rising sea levels have no impact on marine species

c) Coral bleaching due to warmer waters endangers marine life

D) Reduced temperature variability benefits aquatic ecosystems

3. Which factor contributes to the vulnerability of certain species to climate change?

A) Specialized habitat requirements

B) High reproductive rates

C) Broad geographic distribution

D) Generalist ecological niche

4. What is the term used to describe the loss of species in a particular habitat or ecosystem due to climate change?

a) Ecological succession

b) Habitat fragmentation

C) Range expansion

d) Biodiversity erosion

5. Which of the following is a major factor contributing to biodiversity loss due to climate change?

A) Increased habitat conservation

B) Altered temperature and precipitation patterns

C) Oceanic currents

D) Reduction in pollution levels

6. How does climate change affect the migration patterns of animals?

A) Animals tend to migrate less due to stable temperatures

B) Migration timing and routes can be disrupted

C) Migration patterns become more predictable

D) There is no impact on migration due to climate change

7. What phenomenon significantly endangers coral reefs due to climate change?

A) Increased ocean temperatures

B) Increase of seawater

C) Increased oxygen levels

D) Reduced salinity

8. How does climate change contribute to the loss of biodiversity in forests?

A) Forests become more resistant to diseases and pests

B) Increased rainfall benefits diverse species

C) Altered fire regimes and prolonged droughts harm forest ecosystems

D) Reduced CO2 levels promote biodiversity

9. What happens to the habitats of Arctic species due to climate change?

A) Habitats expand, offering more resources for Arctic species

B) Reduced ice cover has no impact on Arctic species' habitats

C) Arctic habitats become more stable

D) Shrinking habitats endanger Arctic species

10. How do rising temperatures impact the distribution of disease-carrying vectors like mosquitoes?

A) Expanded ranges due to more suitable climates

B) Increased temperatures reduce their lifespan

C) Their distribution remains unchanged

D) Reduced reproductive rates in warmer climates

11. What is a potential outcome of climate change on species with limited dispersal abilities?

A) Expansion of their ranges to new habitats

B) Increased genetic diversity due to migration

C) Vulnerability to extinction as suitable habitats shift

D) Reduced competition for resources

12. How does climate change contribute to the extinction risk of certain species?

A) Increased habitat suitability benefits endangered species

B) Altered habitats and food availability increase extinction risk

C) Climate change has no direct impact on species extinction risk

D) Reduction in natural disasters protects vulnerable species

13. How does climate change impact the availability of resources for Arctic species?

A) Decline in available resources due to melting ice and habitat loss

B) Stability in ice-dependent food chains

C) Increased food sources due to rising temperatures

D) Expanded range of resources benefiting Arctic species

14. How does climate change affect the resilience of ecosystems to other stressors such as pollution or habitat destruction?

A) Increased resilience due to adaptable species within ecosystems

B) Climate change has no impact on ecosystem resilience

C) Reduced resilience, making ecosystems more susceptible to additional stressors

D) Enhanced stability, reducing the impact of other stressors on ecosystems

15. What is a primary cause of wetland degradation worldwide?

a) Excessive rainfall

B) Urbanization and land development

C) Controlled flooding

D) Increased conservation efforts

16. What impact does drainage for agricultural purposes have on wetland ecosystems?

A) Enhances wetland biodiversity

B) Improves water retention in wetlands

C) Causes loss of habitat and alters hydrology

D) Increases wetland area

17. How does pollution affect wetland biodiversity?

A) Pollution has no significant impact on wetland species

B) It harms species by altering water quality and food availability

C) It fosters biodiversity by introducing diverse microorganisms

D) It promotes the growth of native species

18. Which of the following is a consequence of invasive species in wetland ecosystems?

A) Increased stability in the ecosystem

B) Improved nutrient cycling

C) Enhanced biodiversity and ecosystem resilience

D) Displacement of native species and disruption of the natural balance

19. What role do wetlands play in maintaining water quality?

A) Wetlands have no impact on water quality

B) They purify water by removing pollutants and excess nutrients

C) They contribute to increased water pollution

D) Wetlands enhance water turbidity

20. What is a potential consequence of overfishing in wetland ecosystems?

A) Disruption of food webs and decline in certain species

B) Increased biodiversity due to selective fishing practices

C) Improved balance in aquatic food chains

D) Higher population of target species

21. How does the loss of wetlands contribute to flood control issues?

A) Increases flood resilience due to better water absorption

B) Reduces natural flood buffers and exacerbates flooding

C) Decreases flood risks by redirecting water flow

D) Has no impact on flood control measures

22. What effect does climate change have on wetland degradation?

A) Climate change has no impact on wetlands

B) Alters precipitation patterns leading to water scarcity in wetlands

C) Enhances wetland biodiversity

D) Promotes wetland restoration

23. Which factor contributes to the decline of migratory bird populations associated with wetlands?

A) Expanded wetland areas

B) Wetland degradation and loss of stopover sites

C) Improved breeding grounds

D) Increased predation within wetland ecosystems

24. What role do wetlands play in carbon storage?

A) They act as carbon sinks, storing carbon and mitigating climate change

B) Wetlands have no impact on carbon levels

C) They release stored carbon into the atmosphere

D) Wetlands increase carbon emissions

25. What effect does the introduction of pesticides have on wetland biodiversity?

A) Enhances biodiversity by controlling invasive species

B) Positively impacts wetland species by improving water quality

C) Encourages the growth of wetland vegetation

D) Harms species by contaminating water and affecting food chains

26. What is a consequence of excessive nutrient runoff into wetland ecosystems?

A) Increased water clarity and improved biodiversity

B) Eutrophication leading to oxygen depletion and fish kills

C) Stabilization of wetland habitats

D) Promotion of diverse aquatic species

27. How does the construction of dams impact wetland ecosystems?

A) Enhances water flow in wetlands

B) Alters water flow and disrupts natural wetland functions

C) Promotes wetland expansion

D) Increases wetland biodiversity

28. How does habitat destruction due to urban expansion impact wetland biodiversity?

A) Causes loss of critical habitats and reduces species diversity

B) Leads to the establishment of new wetland species

C) Increases natural wetland areas

D) Promotes migration of wetland species to urban areas

29. What role do wetlands play in supporting endangered species?

A) Wetlands have no significant impact on endangered species

B) They provide critical habitats for endangered species

C) Wetlands exacerbate the decline of endangered species

D) They contribute to the extinction of endangered species

MCQs MDC 1 Life Science

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