Why did scientists want to learn more about how the Bajau people hold their breath for long periods of time?
O It could provide useful information about how the Bajau people's genes compare to
those of their neighbors.
O It could provide useful information for doctors about how their patients may react to
lack of oxygen.
It could provide useful information about why the diving reflex sends less blood to
the hands and feet.
O It could provide useful information for other divers trying to learn the same skills for
fishing

I think it is A. It could provide useful information about how the Bajau people's genes compare to those of their neighbors.

phylogenetic tree is the tree of life or evolution tree. it shows the different branches of evolution. the sequence goes like tissues - coelom - backbone - endoskeleton - segmentation

a motor homunculus represents a map of brain areas dedicated to motor processing for different anatomical divisions of the body.

homunculus represents the importance of various parts of your body as seen by your brain. as a result, they take up a lot of brain space. although the cortical homunculus is a curiosity, penfield's work in mapping the brain's relationship to the body was invaluable.