Understanding Forest Ecosystems and Nitrogen Cycle

Why do forests not show visible waste accumulation despite generating waste?

• Forests do not generate any waste.

• Waste is blown away by the wind.

• Animals eat all the waste.

• Forests have a natural recycling process.

Which element is abundant in the atmosphere but needs conversion to be used by living organisms?

• Hydrogen

• Carbon

• Oxygen

• Nitrogen

What is the first step in the nitrogen conversion process in the soil?

• Conversion of nitrites to nitrates

• Conversion of atmospheric nitrogen to ammonia

• Conversion of ammonia to nitrates

• Conversion of nitrates to nitrites

Which bacteria is responsible for converting ammonia to nitrates?

• Rhizobium

• Nitrobacter

• Acetobacter

• Nitrosomonas

What gives soil its pleasant smell after rain?

• A specific microorganism

• Acetobacter

• Nitrosomonas

• Nitrobacter