Molecular biology is a branch of biology, so you'll see the detailed process of cell replication, structure of the cytoskeleton, etc. rather than mechanisms and equations of chemical reactions (also...
If you are considering the preservation of species/organisms then I would suggest ecology to be the area within biology that is most centered on preservation. One role of an ecologist is to seek to...
just reg. elementry biology can help you study molecular molecules. go ahead and look on ask jeeves "kids", it's a much better place for excellent homework questions.
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