Write True if the statement is true. If the statement is false, change the underlined word or words to make the statement true.
13. Nitrogen, in the form of ammonia, nitrate, and nitrite, is found in the soil.
14. Nitrogen fixation is the process in which certain bacteria convert nitrogen
gas into nitrates
15. Denitrification is the process by which some soil bacteria convert nitrates
into nitrogen gas.
16. All organisms require nitrogen to make amino acids, which in turn are
used to build carbohydrates.
17. Phosphate is released as rocks and sediments wear down.
18. Plants absorb phosphate from the soil or from water.
19. Phosphorus is the most abundant gas in the atmosphere.
20. Organic phosphate is taken up by producers during photosynthesis and
released by cellular respiration.
21. Phosphorus forms part of the important life-sustaining molecules such as
DNA and RNA.
22. Plants absorb phosphorus from the atmosphere or water.
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