EOC Prep 3&4 Review

3. The water cycle would not occur if which of the following were missing? 

• A. bacteria 
• B. autotrophs 
• C. carbon dioxide 
• D. solar energy

7. The diagram below shows the cycling of nutrients in an ecosystem. The removal of which of the following groups would cause an immediate decrease in the amount of  energy flowing through the system?

• A. Producers 
• B. Consumers 
• C. Decomposers 
• D. Inorganic nutrients

2. Which statement represents a characteristic of an ecosystem that is not likely to sustain itself? 

• A. The Sun provides the needed energy. 
• B. Energy is transferred from plants to animals. 
• C. There are more consumers than producers. 
• D. There are interactions between biotic and abiotic factors.

9. Which of the following energy pyramids shows the correct placement of trophic levels?

• A. 
• B. 
• C. 
• D.

A food chain is illustrated below:  The arrows represented as ~~~> most likely indicate

• A. Energy released from metabolism into the environment as heat.  
• B. Oxygen released from metabolism produced by cellular respiration.  
• C. The absorption of energy from the environment that has been created. 
• D. The transport of glucose away from the organism through photosynthesis.

6. A team of ecologists observed feeding patterns of several populations in the desert. The energy  pyramid shown below depicts the feeding patterns the ecologist observed. Which of the following best explains the difference in the amount of available energy in the trophic  levels of the desert ecosystem?

• A. There is less energy available in the producers because their tissues are less dense than those at  higher trophic levels. 
• B. There is more energy available in the second trophic level because less energy is needed for  hunting compared to the higher trophic levels. 
• C. There is more available energy in the birds of prey because they have greater muscle mass for  storing energy than organisms in lower trophic levels have. 
• D. There is less available energy in the fourth trophic level because of the loss of energy through  metabolism in each of the lower trophic levels