The diagram shows a device that uses radio waves.
What is the role of the part in the diagram labeled X?
Х
O modulate, amplify, and send out waves
O capture, amplify, and demodulate waves
O change the amplitude and frequency of waves
o change the pulse and phase of waves

It really doesn't matter for any of the questions that you've listed.

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.