Ecosystem Ecology

Which of the following is not an abiotic factor?

• sunlight
• bacteria
• pH
• water

Which of the following is a biotic factor?

• Producers
• pH
• water
• humidity

Which of the following best describes an ecosystem?

• populations interacting
• all biotic factors interacting
• inter-species relationships
• all biotic and abiotic factors

Choose the correct sequence for energy flow within an ecosystem

• Herbivores→Producers→carnivores→scavengers
• producers→hervibores→carnivores→scavengers
• producers→carnivores→herbivores→carnivores
• scavengers→producers→herbivores→carnivores

Which of the following are needed for photosynthesis?

• Water, solar energy and carbon dioxide
• water, solar energy and glucose
• carbon dioxide, energy and glucose
• oxygen, water and energy

Which group of organisms performs photosynthesis?

• autotrophs
• scavengers
• heterotrophs
• consumers

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

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

Which of the following shows the complex interactions between species within an ecosystem?

• food chain
• food web
• food pyramid
• energy pyramid

Which of the following is the approximate efficiency of the energy transfer as energy flows through the food chain?

• 1%
• 10%
• 25%
• 50%

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