Are snakes tetrapods ? Explain your answer .

yes

Snakes and other legless reptiles are considered tetrapods because they are sufficiently like other reptiles that have a full complement of limbs. Similar considerations apply to caecilians and aquatic mammals.

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Nitrogen fixation is carried out by the enzyme nitrogenase, which are found in microbes. Microorganisms that fix nitrogen are bacteria called diazotrophs.  The removal of oxygen or the addition of hydrogen.

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