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Nitrogen is converted from atmospheric nitrogen (N2) into usable forms, such as NO2-, in a process known as fixation. ... This occurs in two steps: first, bacteria convert ammonia in to (nitrites) NO2-, and then other bacteria species convert it to NO3- (nitrate). Nitriates are a form of nitrogen that is usable by plants.
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The answer would be A, to lead sperm cells to the ovary. Hope this helps you out!
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Vascular plants have two distinct organ systems: a shoot system and a root system. baked goods.online proccesing. frame, and cars
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water and rocks; energy source, break down dead plants and animals, returning vital nutrients to the soil.
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