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Which best explains why viruses do not have special structures or enzymes that allow them to make their own food? Viruses can use energy of living cells that they infect. Viruses can replicate inside a host that they infect. Viruses can cause contagious illnesses in host cells. Viruses integrate their RNA or DNA into infected cells.
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How does the author's purpose in this passage differ from an author writing about her personal struggle living with asthma?
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Up to what percentage of the world's flora consisted of cycads during the triassic period? 100% 75% 50% 20%
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One reason scientists are trying to develop fuel sources from corn and sugar is because these sources are renewable fossil fuels are being depleted these crops can be widely grown all of the above
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Organ systems are composed of organs, organs are composed of tissues, and tissues are composed of cells. this pattern is organized into levels. organization based on levels can be found in what
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Which best explains why viruses do not have special structures or enzymes that allow them to make th...
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