4.1 Energy, Producers and Consumers

Which organisms are responsible for capturing energy from nonliving sources?  

• Heterotrophs

• carnivores

• autotrophs

• Herbivores

What process do plants use to maintain atmospheric oxygen levels?  

• chemosynthesis

• Decomposition

• photosynthesis

• Respiration

Which type of organism feeds on decomposing organic matter?

• Autotrophs

• Detritivores

• carnivores

• Omnivores

What inputs are required for chemosynthesis?  

• Sunlight and water

• Carbon dioxide, oxygen, and hydrogen sulfide

• Glucose and oxygen

• Nitrates and phosphates  

Which process uses chemical energy to produce carbohydrates?

• Chemosynthesis  

• photosynthesis

• Fermentation

• Decomposition

What is the primary role of decomposers in an ecosystem?

• Yo produce energy

• To recycle nutrients

• To consume primary producers

• To compete with herbivores

The ultimate source of energy for life on Earth is -------------------------.

(a)