1a-2 Development of life on Earth

Where did simple single-cells possibly form?

• Volcanic geothermal vents

• Mountaintops

• Deep underground

• Outer space

What type of organisms were the Archaea?

• Bacteria

• Plants

• Animals

• Fungi

What is the role of water in living organisms?

• It performs essential physiological functions

• It controls environmental conditions

• Both of the above

• None of the above

What is the most important function of water as a solvent?

• Transport within organisms

• Temperature control

• Absorption of UV radiation

• All of the above

What is the temperature range on Earth that allows for liquid water?

• Below 0°C

• 0°C to 35°C

• 35°C to 50°C

• Above 50°C

Which atmospheric gases are important for life on Earth?

• Carbon dioxide and nitrogen

• Oxygen and nitrogen

• Carbon dioxide and oxygen

• Oxygen and helium

What provides the energy for photosynthesis?

• Sunlight

• Heat energy

• Infrared energy

• Ultra-violet light

When did the surplus dissolved oxygen start to rise in the atmosphere?

• 2.7 billion years ago

• 4.6 billion years ago

• 540 million years ago

• 2.45 billion years ago

What is the role of carbon dioxide in the atmosphere?

• It helps to retain heat energy

• It prevents temperature rise

• It supports photosynthesis

• All of the above

What are biogeochemical cycles?

• Processes that produce biogeochemical reactions

• Processes that deplete nutrient resources

• Processes that support life over long periods

• Processes that control atmospheric composition