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Ecology Unit Practice Test. 1. Organisms need water to live. Which of these best explains why?. Water gives energy. Water gives oxygen. Water gives carbon dioxide. Water is used in chemical reactions. 2. The purpose of the carbon cycle provides all organisms with ___. Energy Carbon dioxide
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1. Organisms need water to live. Which of these best explains why? • Water gives energy. • Water gives oxygen. • Water gives carbon dioxide. • Water is used in chemical reactions.
2. The purpose of the carbon cycle provides all organisms with ___. • Energy • Carbon dioxide • Amino acids • Nitrates
3. The nitrogen cycle provides all organisms with materials to make ___. • Energy • Nitrates • Proteins • Oxygen
4. These organisms are responsible for converting organic materials to inorganic materials. • Bacteria • Consumers • Decomposers • Producers
5. These organisms are responsible for converting inorganic materials to organic materials. • Bacteria • Consumers • Decomposers • Producers
6. Producers get nitrogen from the soil in the form of ___. • Ammonia • Nitrogen air • Nitrates • Proteins
7. All organisms contribute to the water cycle through the process of ___. • Transpiration • Decomposition • Condensation • Nitrification
8. These organisms are responsible for changing the different forms of nitrogen in the soil. • Bacteria • Consumers • Decomposers • Producers
9. When organisms are returned to the soil, they are converted into ___. • ammonia • nitrates • amino acids • proteins
10. Photosynthesis is summarized as the following: light + CO2 + H2O C6H12O6 + O2Which of the following is true about the purpose of photosynthesis? • Carbon dioxide is converted into glucose. • Carbon dioxide is converted into oxygen. • Sunlight is converted into glucose. • Sunlight is converted into oxygen.