bio quiz 13.5-6

The water cycle, in which water moves from the atmosphere, to the surface, below ground, and back, is also called the

• biogeochemical cycle.
• oxygen cycle.
• hydrologic cycle.
• nitrogen cycle.

Which two biogeochemical cycles depend directly on photosynthesis?

• the hydrologic and oxygen cycle
• the carbon and phosphorus cycle
• the nitrogen and phosphorus cycle
• the oxygen and carbon cycle

Fossil fuels are part of which of the following cycles?

• oxygen
• carbon
• nitrogen
• phosphorus

What happens during the process of nitrogen fixation?

• Bacteria change usable nitrogen into gaseous nitrogen.
• Bacteria grow on nodules on plant roots.
• Bacteria absorb ammonia and excrete ammonium.
• Bacteria convert gaseous nitrogen into a usable form of nitrogen.

Where does most of the phosphorus cycle take place?

• in the atmosphere
• at and below ground level
• on fungi near plant roots
• close to rocky terrain

Each level in a food chain contains less energy than the one below it because some energy is

• added to the system.
• lost as heat.
• consumed by carnivores.
• incorporated into biomass.

The term biomass refers to the total

• dry mass of the organisms in a given area.
• unused material excreted as waste.
• producer-to-consumer ratio.
• mass of all living things on Earth.

A biomass pyramid is a diagram that compares the

• biomass of different organisms.
• numbers of different organisms.
• biomass of different trophic levels.
• distribution of energy in trophic levels.

What would happen to the number of individual organisms in each trophic level as you moved up a typical food chain?

• the numbers would increase
• the numbers would stay the same
• the numbers would decrease
• there is no way to tell

How much energy is available to the 3° consumers in an energy pyramid?

• a large % of the energy in the 2° level
• a small % of the energy in the 2° level
• all of the energy in the 1° level plus all the energy in the 2° level
• a large % of the energy in the 1° level plus the energy in the 2° level