(b) rather than looking at species richness, DNA bar coding provides us an opportunity for the first time, to frame conservation by addressing diversity in phylogeny.
(c) since the bits of genes which are used are from mitochondrial DNA they would be unique to each species, thus helping in identifying species,
(d) it will work like a dream with insects (that have been preserved in alcohol for ages) and example being the DNA barcoding project on Arctic Canadian Collembolans.
To chart conservation strategies by using DNA barcoding, rather than addressing all the fauna present in one place, addressing a few taxa alone might be adequate. However while selecting this elite group of taxa, we need to make sure they suit the criteria of being an ecological indicator and not because they are our favourite groups (our usual mistake!).