Why are bacteria a necessary part of the nitrogen cycle? . . a. living things cannot use atmospheric nitrogen.. . b. living things cannot use the nitrogen in plants.. . c. bacteria are the main nitrogen reservoir.. . d. bacteria are the main nitrogen transpirators..

Dna. we have heard that we are a product of our dna. but where is it? how do we "get" our dna? it is passed to us, from our parents, but in what form? several vocabulary words associated with inheritance are used interchangeably and sometimes, incorrectly. let's see if you can clear this up for someone just learning about inheritance and cell structure.