2. Rule 2: All zeros between nonzero digits are always significant 2.03 ___ 708 ___
230518 ___ 70,164 ___
5.304 ___ 10001 ___

How is it possible that phylogenies based on sequences from nuclear genomes and organellar genomes (i.e., chloroplasts and mitochondria) from the same group of species yield phylogenetic trees with different branching orders?   answer :   the genome of the endosymbiont is more closely related to members of the group in which it originally evolved, while the nuclear genome of the engulfing organism has its own evolutionary trajectory.