MCQs on mass extinction

 

MCQs on mass extinction

1. Which mass extinction event is often referred to as the "Great Dying"?

   a) Ordovician-Silurian

   b) Devonian

   c) Permian-Triassic

   d) Triassic-Jurassic

 

2. What percentage of species was lost during the Permian-Triassic extinction?

   a) 27%

   b) 57%

   c) 70-75%

   d) 90-96%

 

3. Which event led to the emergence of new ecosystems and extinction of numerous lineages?

   a) Devonian extinction

   b) Triassic-Jurassic extinction

   c) Cretaceous-Tertiary extinction

   d) Permian-Triassic extinction

 

4. The Triassic-Jurassic extinction coincided with the breakup of which supercontinent?

   a) Pangaea

   b) Gondwana

   c) Laurasia

   d) Rodinia

 

5. What is the primary cause of the Cretaceous-Tertiary (K-T) extinction?

   a) Volcanic activity

   b) Climate change

   c) Impact of a large asteroid/comet

   d) Ocean acidification

 

6. Which extinction event resulted in the demise of non-avian dinosaurs?

   a) Devonian

   b) Permian-Triassic

   c) Triassic-Jurassic

   d) Cretaceous-Tertiary (K-T)

 

7. What factor is responsible for the widespread extinctions among marine invertebrates during the Ordovician-Silurian extinction?

   a) Climate cooling

   b) Volcanic activity

   c) Sea-level fluctuations

   d) Glaciation

 

8. Which extinction event allowed for the proliferation of dinosaurs?

   a) Devonian

   b) Permian-Triassic

   c) Triassic-Jurassic

   d) Cretaceous-Tertiary (K-T)

 

9. What phenomenon is associated with the cause of the Permian-Triassic extinction?

   a) Gamma ray bursts

   b) Methane eruptions

   c) Hydrogen sulfide emissions

   d) Volcanic activity

 

10. Which extinction event is one of the earliest documented in the fossil record?

    a) Devonian

    b) Permian-Triassic

    c) Triassic-Jurassic

    d) Ordovician-Silurian

 

11. What percentage of families was lost during the Triassic-Jurassic extinction?

    a) 23%

    b) 48%

    c) 57%

    d) 70-75%

 

12. The Devonian extinction event resulted in significant impacts on which ecosystems?

    a) Terrestrial

    b) Freshwater

    c) Marine

    d) Polar

 

13. The main cause of the Ordovician-Silurian extinction is attributed to:

    a) Impact events

    b) Volcanic activity

    c) Climatic cooling

    d) Oceanic disturbances

 

14. Mass extinctions primarily affect:

    a) Species diversity

    b) Genetic variation

    c) Climate stability

    d) Geological formations

 

15. The consequences of mass extinctions include:

    a) Reduction of competition

    b) Increase in biodiversity

    c) Preservation of ecosystems

    d) Accelerated evolution

 

 You can also read Mass extinctions (learnzoologyonline.blogspot.com)

Answers

1. c) Permian-Triassic

2. d) 90-96%

3. c) Permian-Triassic extinction

4. a) Pangaea

5. c) Impact of a large asteroid/comet

6. d) Cretaceous-Tertiary (K-T)

7. c) Sea-level fluctuations

8. c) Triassic-Jurassic

9. d) Volcanic activity

10. d) Ordovician-Silurian

11. a) 23%

12. c) Marine

13. c) Climatic cooling

14. a) Species diversity

15. a) Reduction of competition