Acollege dormitory room measures 10 feet wide by 12 feet long by 8 feet high. weight density of air is 0.07 lbs/ft3. what is the weight of air in it under normal conditions?

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.