The top 3 sources of protein for vegans are always nuts, beans, and tofu (or soybeans).
<span>The question says,'...........convert ammonium into nitrates whilw .........converts nitrates into nitrogen gas. The correct option is A. Nitrification is a two stage process by which ammonia or ammonium is biologically oxidised to nitrate while dentrification is the biological oxidation of nitrate to nitrogen gas by dentrifying bacteria.</span>
Explanation:
Description
The law of conservation of mass states that mass in an isolated system is neither created nor destroyed by chemical reactions or physical transformations. According to the law of conservation of mass, the mass of the products in a chemical reaction must equal the mass of the reactants.
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transport of oxygen</span>. Circulatory system transports oxygen to different parts of the body through red blood cells. Digestion of food is not the right answer because it is the role of the digestive system. The endocrine system facilitates production of hormones and reflex response is made possible by the nervous system, so the last two are also not the right answers.