Do bacteria need nitrogen? Why or why not?

No

Explanation:

Bacteria does not need nitrogen because nitrogen is used  to synthesis protein, amino acid  and DNA. Also Bacteria doesn't contain nitrogen.

the correct answer is: b. pantala flavescens, because these organisms would have a high level of genetic variation due to sexual reproduction.  

because involves two organisms (parents) whose genetic material combines, sexual reproduction leads to genetic variation in new generations of offspring. the offspring is an unique organism, with new genome, more protected with the higher ability to adapted. this process is fundamental to evolution.

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