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Some viruses attack animal cells. They attach themselves to the host cells and inject the genetic material, which in turn produces new Q-viruses in the host cells. The viruses either have RNA or DNA as their genetic material.
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B. decreasing the carbon dioxide level in the atmosphere
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Both we have the same idea. I also have thought about that before. lol
A food web consists of many food chains. A food chain only follows just one path as animals find food. eg: A hawk eats a snake, which has eaten a frog, which has eaten a grasshopper, which has eaten grass. A food web shows the many different paths plants and animals are connected.