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| Read each sentence and identify the word/phrase that you believe correctly completes the statement. Then, click on the arrow to see if your answer is correct. 1. There are four major groups of organic molecules important to life: , , , and . 2. The energy in sunlight is used by photosynthetic organisms to make (or ). 3. (or ) is broken down by respiration, and the energy that is released is stored in molecules of . 4. When primary production in the ocean is nutrient-limited, the nutrient that most often is limiting is . 5. The major difference between prokaryotes and eukaryotes is the presence of -bound . 6. The movement of dissolved substances from areas of high concentration to areas of low concentration is called . is the diffusion of water through a . 7. is the control of the internal concentration of a solute. 8. The body temperatures of go up and down as the water gets warmer or colder. maintain a relatively constant body temperature. 9. Most cells divide by the process of , which produces two identical cells called . 10. Sexual reproduction involves the fusion of male and female , which are produced by a form of cell division called . 11. A population of organisms that can breed with each other and are reproductively isolated from other populations is the . |