Ecology and Energy Flow Quiz

What is the main source of energy for photosynthesis?

• Water

• Carbon dioxide

• Oxygen

• Sunlight

What is the by-product of photosynthesis released into the atmosphere?

• Water

• Carbon dioxide

• Oxygen

• Glucose

What are the three main mechanisms through which solar energy is lost before it can be used by autotrophs?

• Reflection, Absorption, Decomposition

• Radiation, Reflection, Absorption

• Radiation, Absorption, Decomposition

• Reflection, Radiation, Decomposition

What is the difference between Gross Primary Productivity and Net Primary Productivity?

• GPP is the energy available for the next trophic level, NPP is the total energy fixed by autotrophs

• GPP is the total energy fixed by autotrophs, NPP is the energy left after autotrophs have used energy for their own needs

• GPP is the energy available for the next trophic level, NPP is the energy used for respiration

• GPP is the energy wasted through respiration, NPP is the total energy fixed by autotrophs

What is the formula to calculate energy efficiency?

• Energy Efficiency = (NPP / GPP)

• Energy Efficiency = (NPP / GPP) x 100

• Energy Efficiency = (GPP / NPP)

• Energy Efficiency = (GPP / NPP) x 100

What is the unit used to illustrate the flow of energy through the food chain in ecological pyramids?

• Liters

• Count of individual organisms

• Grams or tonnes

• Kilojoules

Why can an energy pyramid never be inverted?

• Because energy is not transferred between trophic levels

• Because energy increases at each trophic level

• Because energy decreases at each trophic level

• Because energy remains constant at each trophic level

What are some ways in which energy is 'wasted' or lost in ecosystems?

• Radiation, Reflection, Absorption

• Cellular Respiration, Excretion/Faeces, Decomposition

• Reflection, Absorption, Excretion

• Photosynthesis, Cellular Respiration, Decomposition

What is the formula to calculate Net Primary Productivity?

• NPP = GPP x Wasted Energy

• NPP = GPP / Wasted Energy

• NPP = GPP - Wasted Energy

• NPP = GPP + Wasted Energy

What is the value of Net Primary Productivity if the Gross Primary Productivity is 10,000 J/m²/d and the energy used for respiration is 3,000 J/m²/d?

• 10,000 Joules/m²/day

• 5,000 Joules/m²/day

• 3,000 Joules/m²/day

• 7,000 Joules/m²/day