Chapter 3 Ecosystems Ecology

Which of the following is not an abiotic factor?

• Sunlight
• bacteria
• pH
• water

Which of the following are biotic?
I.  Decomposers
II.  Energy flow
III.  Producers

• I only
• II only
• III only
• I and III

Choose the correct sequence for energy flow within an ecosystem

• herbivores --> producers --> carnivores --> scavengers
• producers --> herbivores  --> carnivores --> scavengers
• producers --> carnivores --> herbivores --> scavengers
• carnivores --> scavengers --> herbivores --> producers

Of the following, which are products of photosynthesis?
I.  Glucose
II.  Carbon dioxide
III.  Water

• I only
• II only
• III only
• I, II, and III

Which group of organisms performs photosynthesis?

• Autotrophs
• Scavengers
• Heterotrophs
• consumers

Which of the following organisms performs cellular respiration? I.  Autotrophs II.  Heterotrophs III.  Decomposers

• I only
• II only
• III only
• I, II and III

The sun is the ultimate source of energy for terrestrial ecosystems.  Approximately how much of the potential energy available from the sun’s rays hitting the earth is used in photosynthesis?

• 1%
• 10%
• 25%
• 59%

A forest has a GPP of 3.8 kg C/m2/year and the rate of cellular respiration is 2.4 kg C/m2/year.  What is the NPP?

• 6.2 kg C/m²/year
• 1.4 kg C/m²/year
  
• 1.0 kg C/m²/year
• 9.12 kg C/m²/year

How is the majority of energy within an ecosystem lost?

• heat loss
• energy used to grow biomass
• cellular respiration
• cellular metabolism

What law best relates to energy loss within an ecosystem?

• First law of thermodynamics
• second law of thermodynamics
• third law of  thermodynamics
• law of conservation of matter