APES

What is the process called when nitrates are converted back into nitrogen gas?

• Nitrogen Fixation

• Nitrification

• Denitrification

• Ammonification

What is the primary productivity that represents the total energy captured by producers?

• Total primary productivity

• Net primary productivity

• Gross primary productivity

• Secondary productivity

What is the term for the total amount of energy that producers convert to chemical energy in organic molecules per unit of time?

• Net primary productivity

• Gross primary productivity

• Secondary productivity

• Biomass accumulation

What is the main cause of acid rain?

• Carbon dioxide emissions from vehicles

• Sulfur dioxide and nitrogen oxides in the atmosphere

• Chlorofluorocarbons from refrigerants

• Methane released from agriculture

What is the process called when nitrogen gas is converted into ammonia?

• Nitrogen fixation

• Ammonification

• Nitrification

• Denitrification

What process occurs when plant roots absorb ammonium ions and nitrate ions for use in making molecules such as DNA, amino acids, and proteins?

• Photosynthesis

• Respiration

• Assimilation

• Transpiration

What is the term for the variety of life in an ecosystem?

• Biodiversity

• Ecosystem Diversity

• Species Richness

• Genetic Variation

What biome is characterized by moderate rainfall and distinct seasons?

• Tropical Rainforest

• Desert

• Temperate Forest

• Savanna

Which biome has very low precipitation and variable temperatures?

• Desert

• Tundra

• Tropical Rainforest

• Temperate Forest

What is the consequence of too much phosphorus in waterways?

• Eutrophication

• Acidification

• Oxygen depletion

• Thermal pollution