Joseph is riding his bike at 10 kph the south. Maria is about 5 km behind him and traveling at 15 kph to the south. If they maintain constant velocities, will Maria catch up to Joseph? What is her relative velocity?

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.

It is the areas with lines. this may sound a little confusing, but i hope it !