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1. An organism that cannot synthesize its own organic molecules is called a a. Producer b. Autotroph c. Heterotroph d. A and B 2. In energy pyramids, which of the following trophic levels contain the largest amounts of useable energy? a. Producers b. First level consumers c. Second level of consumers d. Third level of consumers 3. Which of the following organisms feeds on animal and plant material? a. Carnivores b. Herbivores c. Omnivores d. Autotrophs 4. In a particular ecosystem, alligators eat fish. Only about 10% of the energy available to the fish is available to the alligators. What happens to the remaining energy? a. It is lost form the ecosystem as heat b. It is destroyed in chemical reactions c. It is converted into the fish’s biomass d. It is absorbed during cellular respiration 5. Which of the following would not be considered an autotroph? a. Plant b. Algae c. Mushroom d. Photosynthetic bacteria
