Maintaining biodiversity

What is biodiversity?

• A measure of how many different species live in an ecosystem

• All organisms in a food web depend upon each other

• All the food chains for a habitat combined

What term describes the graph of World human population increase?

• Normal distribution

• Exponential

• Linear

Which of these is not a reason for an increase in human population?

• Better health care

• Intensive farming

• Antibiotic Resistant bacteria

What is the major cause of acid rain?

• Sulfur dioxide and nitrogen oxides

• Ozone

• Carbon dioxide

What is eutrophication caused by?

• The greenhouse effect

• Excess fertilisers

• Smog

What process occurs very slowly in peat bogs?

• Respiration

• Photosynthesis

• Decomposition

What are peat bogs an important store of?

• Carbon

• Nitrogen

• Oxygen

Which of these is not a threat of global warming?

• More tropical diseases

• Lowering of sea levels

• Extinctions

What is conservation?

• Cutting down of trees

• Rapid growth of algae as a result of fertilisers

• The preservation of ecosystems

Which of these is NOT a way of increasing biodiversity?

• Deforestation

• Recycling

• Planting hedgerows