2nd Year Biology Chapter 13 Test13. Climate Change

Q1. Multiple choice questions (Attempt all · 10 × 1 = 10)

1. Which human activity leads to enhanced greenhouse effect?
   1. Transportation and burning fossil fuels
   2. Photosynthesis in plants
   3. Recycling of waste
   4. Planting trees
2. Deoxygenation of oceans refers to:
   1. Reduction of dissolved oxygen in warmer waters
   2. Addition of nitrogen in water
   3. Excess oxygen production by phytoplankton
   4. Melting of polar ice
3. The wobble or change in Earth’s axis of rotation is called:
   1. Eccentricity
   2. Obliquity
   3. Precession
   4. Tilt
4. Which of the following best describes the term "anthropogenic climate change"?
   1. Climate change caused by natural factors such as volcanic eruptions.
   2. Climate change that occurs gradually over millions of years.
   3. Climate change results from human activities like deforestation and industrialization
   4. Climate change due to changes in the Earth’s orbit.
5. Which of the following impacts of climate change affects animals’ migration patterns?
   1. Increased volcanic eruptions
   2. Ocean acidification
   3. Shifting habitats due to temperature changes
   4. Urbanization
6. Coral reefs are important because:
   1. They provide coastal protection and habitats
   2. They store fossil fuels
   3. They regulate atmospheric CO₂
   4. They generate rainfall
7. Deforestation affects climate because:
   1. It absorbs more CO₂
   2. It reduces the Earth's natural CO₂ buffers
   3. It increases rainfall
   4. It increases soil nutrients
8. Which of the following is not a major event of climate change?
   1. Ocean acidification
   2. Changes in monsoon rainfall pattern
   3. Extreme hot and cold weather
   4. Photosynthesis in plants
9. El Niño results from:
   1. Cold water moving eastward
   2. Ocean freezing
   3. Warm surface waters shifting eastward
   4. Ice caps melting
10. Behavioural changes in fish due to ocean acidification include:
    1. Better navigation and mating success
    2. Difficulty in smelling, avoiding predator
    3. Increased growth rates
    4. Stronger shell formation