IBESS 2.2 Photo/Resp/Pyramids

The efficiency of energy transfer from a lower trophic level to the next highest level is roughly

• 1%
• 10%
• 100%
• 1000%

Tags

NGSS.MS-LS2-3

Trophic levels are represented by 

• squares
• circles
• pyramids
• lines

Tags

NGSS.MS-LS2-3

What limits the length of a food chain in an ecosystem?

• The size of the individual organisms

• Competition between organisms

• The loss of energy between trophic levels

• Natural selection

What is lost between trophic levels and cannot be recycled?

• Heat

• Nitrogen

• Carbon compounds

• Biomass

The Silver Springs feed into the Silver River in Florida. The diagram shows a pyramid of energy for the Silver Springs ecosystem. The units are kJ m^–2 y^–1. What do level I and level III represent in the pyramid of energy?

• l sunlight, lll secondary consumer

• l producer, lll tertiary consumer

• l producer, lll secondary consumer

• l primary consumer, lll tertiary consumer

The Australian pitcher plant (Cephalotus follicularis) is a green plant that traps and feeds on flies and other live insects. What is this plant’s mode of nutrition?

• Producer and saprotroph

• Autotroph and detritivore

• Autotroph and heterotroph

• Consumer and saprotroph

Animals in the highest trophic level of a food chain will often be the largest in body size but will be few in numbers. What accounts for the small numbers?

• Food eaten by animals at the highest trophic level has a lower energy content per gram

• Energy losses through the food chain

• Conversion of heat energy into chemical energy

• Biomass of producers is small

Which of the following trophic levels would have the LEAST amount of available energy?

• Producers

• first order consumers (primary consumers)

• second order consumers (secondary consumers)

• third order consumers (tertiary consumers)

What do the arrows in the food chain indicate about the flow of energy in an ecosystem?

• energy is continuously recycled by the organisms in an ecosystem

• energy flows in one direction in an ecosystem from producers to consumers

• more of the available energy in an ecosystem is given to large animals than to small animals

• organisms at the end of the food chain receive more energy than those at the beginning

Approximately how much energy is available to the secondary consumers in this energy pyramid?

• 10 kcal/m²/year

• 100 kcal/m²/year

• 1,000 kcal/m²/year

• 5,000 kcal/m²/year