Scientific research shows that birds are capable of regenerating their hair cells. true or false

True.

Explanation:

Scientific work has concluded that mammalian cochlea hair cells cannot regenerate. However, in the lower vertebrates (fish, batrachians and reptiles) there is permanent hair cell renewal under normal conditions and also after injury.

In bird cochlea there is no spontaneous regeneration, but hair cells have the ability to do so after they have been destroyed (sound trauma, ototoxicity), thus restoring auditory function.  Understanding the molecular mechanisms of hair cell regeneration in birds may provide important insights to one day in stimulating mammalian cochlear regeneration.

grav potential energy

when jerome paddle in flowing river towards east the net speed of jerome will increase

so the net speed of jerome will be given as

now the speed of paul will be same as it is given as he is running on the ground

so

so here we can say since the speed of jerome is more so he will win the race

now as we know the distance so the time difference is given as

so jerome will reach first and the time difference will be 203.55 s or 3.4 min