Answer:
Nitrogen-fixing bacteria, microorganisms capable of transforming atmospheric nitrogen into fixed nitrogen (inorganic compounds usable by plants). More than 90 percent of all nitrogen fixation is effected by these organisms, which thus play an important role in the nitrogen cycle.
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Answer:
It is found only in animal cells.
Answer:
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Explanation:
Melanin provides pigmentation to the skin and it also provides UV ray protection (which is its role in the epidermis).
B) it involves a chemical reaction.
Breathing is a part of physiologicalrespiration and functions to bring oxygen into the lungs and expel carbon dioxide. Cellular respiration is a chemical process by which energy is obtained within individual cells from biomolecules like glucose.
